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Trailing-Edge - PDP-10 Archives - BB-H580E-SB_1985 - cbl12c.doc
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CBL12C.DOC -- COBOL-74 V12C Documentation
October 1985






























COPYRIGHT (C) 1985 BY
DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.


THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH  LICENSE AND WITH THE
INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR  ANY  OTHER
COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE  SOFTWARE  IS  HEREBY
TRANSFERRED.

THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE  WITHOUT  NOTICE
AND  SHOULD  NOT  BE  CONSTRUED  AS  A COMMITMENT BY DIGITAL EQUIPMENT
CORPORATION.

DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF  ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
COBOL-74 V12C Documentation                                     Page 2


1.0  SUMMARY

The major changes between COBOL V12B and COBOL V12C are:

Bug fixes (see sec 2.1 through 2.6).

COBOL version 12C consists of:
        CBL74    version 12C(1574)
        C74OTS   version 12C(1141)
        COBDDT   version 12C(47)
        ISAM     version 12C(212)
        LIBARY   version 12C(31)
        RERUN    version 12C(7)

The above software will run on all supported  monitors  and  has  been
tested under TOPS-10 7.01.

COBOL-74 version 12C conforms to the full ANSI  highest  level  except
for:
RPW  It contains ANS-68 Report Writer

See section 3 for known deficiencies.

See COBOL INSTALLATION GUIDE  for  configuration  switch  setting  and
compatibility issues.


1.1  Bibliography

COBOL-74 LANGUAGE MANUAL AA-5059B-TK, AD-5059B-T1
COBOL INSTALLATION GUIDE (COBOL.INS)
CBL12C.DOC AND SRT4D.DOC
COBOL-74 V12C Documentation                                     Page 3


1.2  Required Software

The following software or later is required to build COBOL V12C.

     Name           Version
     ----           -------
     MACRO          53A(1173)
     LINK            4A(1220)
     MAKLIB          2A(67)
COBOL-74 V12C Documentation                                     Page 4
EXTERNAL CHANGES and OPTIONS


2.0                 EXTERNAL CHANGES AND OPTIONS


2.1                 COBOL BUG FIXES SINCE COBOL V12B(1131)
     1300           Arg passing fails if arg is redefined but used as original later

     1301           Optimizing SKIP instruction can cause Illegal Mem Ref

     1302           Bad table link if RMS RECORD KEY is missing

     1303           Bad code for RMS file with Depending Variable

     1304           68274 fails if first item in COPY LIBRARY must be replaced

     1305           Bad code for WRITE AFTER ADVANCING data-name

     1306           Bad table link at 535214 if REL KEY is not defined

     1307           Move 0 to COMP-3 item

     1310           First of two LIB files is forgotten

     1311           Bad placement Diag 179 when ref made to para def twice in sect

     1312           Warning for +,+++... or -,---...

     1313           No diag when CR LF and sect or para name follows IF cond clause 

     1314           Continue  char after "(" gives bad subscript

     1315           Save block for A/B params during Search 1 word short causes Ill inst in Phase E

     1316           Copy replacing para name after * comment omits LF - diag State. Expec

     1317           IF on 2500 char item fails

     1320           COBOL-68 ref to OCCURS DEPEN items don't conform to ANSI-68 standards

     1321           USE ... F.6 name OPGN F.6 name fails after first OPGN

     1322           Check last para in prog for ending in uncond GOTO

     1323           Test receiving alphanumeric edited field for size < sending field

     1324           Non-BIS, transfer of more than 2047 characters fails

     1325           Comments in DATE-COMP being dropped even w/ *, reset DCCFLG if scanning comm

     1326           Edit 1322 broke CREF listings

     1327    ID DIV subscript required - add call to SETOPB to Edit 1126

     1330           Check memory size of OBJECT-COMPUTER, give warning and set to max if too large

COBOL-74 V12C Documentation                                     Page 5
EXTERNAL CHANGES and OPTIONS


     1331           Failure in phase E - WRITE ADVANCING data-name LINES, data-name syntaxed

     1332           COLLATING SEQUENCE scanning too far

     1333           Fatal error when using ORGANIZATION IS RELATIVE WITH CHECKPOINT OUTPUT

     1334           Supersedes edits 1322 and 1326

     1335    Declare DATAB entries for indexes if REPORT SECTION scanned 

     1336           Convert modes for INDEX and COMP-3 fields

     1337    Fix MOVE literal to EDITED-DATA-FIELD of length 1

     1340           Add warnings to 68274 for JUSTIFIED stmt w/
                     value and NOT in abbrev comb rel cond

     1341           Test on mode of "A" operand to prevent multiple
                     trunc warnings if immediate mode

     1342           Handle "D" in continuation column when
                     scanning for the end of a literal

     1343    68274 - convert NOTE into a comment

     1344           Bad code generated for a literal compare

     1345           Trap illegal UUO's on TOPS10

     1346    Address of conversion routine for depending on
                     field stored wrong

     1347           Eliminate warning set up by edit 1312 for fields
                     with non floating symbols

     1350           68274 Give warning for DISPLAY or STOP signed integer

     1351    Avoid BAD TABLE LINK by storing READ .. INTO
                     operands in a fixed location in phase E

     1352           Fix double precision floating point subtract

     1353           If operand in literal compare too large, give
                     error rather than halt

     1354           RMS START error - wrong alt. key made be used
                     if mult. keys at same starting loc.

     1355           MOVE ZERO TO COMP-3 ITEM gets wrong value,
                     fix to edit 1307

     1356           Allow qualification in DATA RECORDS ARE clause

     1357           68274 EXAMINE replacing a word causes HALT
COBOL-74 V12C Documentation                                     Page 6
EXTERNAL CHANGES and OPTIONS



     1360           68274 conversion of a file with COPY REPLACING

     1361           68274 dies if CVT is not requested

     1362           Declare HLDSAV outside of MCS!TCS conditional code

     1363           Fix syntaxing of SPECIAL-NAMES is defining both
                     collating seq and CHANNEL numbers

     1364           Set size of delimiter to 1 if fig. const. and 
                     source is edited field

     1365           Size of STRING source wrong if num edited and
                     defined with OCCURS clause

     1366           Correct edit 1335, set up CURHLD properly

     1367           Correct edit 1343, return after converting
                     NOTE to comment

     1370           Make CURAKT an absolute address so XPAND
                     will update it correctly

     1371           Set CUREOP to B operand before generating
                     truncation warning

     1372           Gives error message when COPY REPLACING finds ==
                     missing after BY.

     1373           Corrects page advancing when more than
                     2 report header lines

     1374           Check the collating sequence before
                     generating high-values

     1375           Check to see if DATAB entry
                    contains DA.DEP field
                    
     1376           Correct diagnostic if line before
                      FD is too long
                    
     1377           Gives warning on truncation when converting FP to fix
                    
     1400           Fixes LABEL USE PROCEDURE for file specific format
                    
     1401           Flag error when statements are in EXIT paragraph
                    
     1402           Make COMPUTE do floating point divide
                    
     1403           EDIT WITHDRAWN - Do not install: Gives truncation
                    warning message after rounding
                    
     1404           Update byte pointer after LATTAB expands
COBOL-74 V12C Documentation                                     Page 7
EXTERNAL CHANGES and OPTIONS


                    
     1405           Makes NEXT SENTENCE after ELSE without period get fatal
                    
     1406           Fix COPY REPLACING for continuation in A margin
                    
     1407           Fix COPY REPLACING in ID DIVISION
                    
     1410           FIX MOVE SPACES TO DATA ITEM IN LINKAGE SECTION
                    
     1411           Provide leading truncation warning in COMPUTE
                    statement when ROUNDED
                    
     1412           Makes LSU work with ISAM sequential access
                    
     1413           Fix 68274 conversion of DBMS statement
                    
     1414    DBMS USE procedures in the declaratives section
                    of subprogram are ignored
                    
     1415           Generate SET TALLY TO 0
                    
     1416           Generate warning message for 68274
                    
     1417           Fix 68274 conversion of write stmt.
                    
     1420           Fix generation of code for EBCDIC sorts
                    
     1421           Generate left truncation for RIGHT JUSTIFY.
                    
     1422           Fix conversion of DATE-COMPILED line
                    
     1423           68274 Fix conversion of FILE LIMITS
                    
     1424           Give fatal error on non-DISPLAY data declared
                    in file section
                    
     1425           68274 Fix conversion of RESERVE statement
                    
     1426           68274 Make TALLY a COMP item
                    
     1427           68274 Generates warning SHOULD BE UNSIGNED INTEGER
                    when data item is an unsigned integer.
                    
     1430           Store intermediary result in 2-wd temp
                    if d.p. floating point

     1431           DBMS - syntax error on FIND statement if
                    identifier-2 not COMP

     1432           Indirect command file for compiler doesn't type
                     outp warnings on TTY.

     1433           Fix edit 1373 when report has no PAGE HEADING 
                     report groups
COBOL-74 V12C Documentation                                     Page 8
EXTERNAL CHANGES and OPTIONS



     1434           Allow UNSTRING to return sign to signed
                     destination fields

     1435           Prevent TI wait state after error message is printed
                     for /Y<cr-lf>

     1436           Fix 68274 conversion in COMM. SECTION

     1437           Generate error message for all undef. errors
                     on one line.

     1440           COPY REPLACING of numeric literal loses next period

     1440           COPY REPLACING loses terminal period if replacing a numeric literal.

     1441           Fix edits 1402 and 1430 for NON-BIS compilers

     1442           Move of separate sign display to 1-word comp moves zero
                     or minus sign only

     1443           Add to Edit 1431 to check for decimal places

     1444           68274 has problem with IS when comment columns exist

     1445           68274 removes period if last clause is turned into a comment.

     1446           Don't overwrite user-defined floating currency sign
                     with minus

     1447           Fix Ill mem ref when PROGRAM-ID contains any character
                     other than "A"-"Z", "a"-"z", "0"-"9"

     1450           Gives error message on FREE verb syntax error

     1451           Fix bad-table link in phase E

     1452           Fix error on RESET command

     1453           Give truncation warning at correct LN, CP

     1454           68274 has problems with period

     1455           68274 has problems with NOTE

     1456           Fix COMPUTE if first term uses 'ZERO'

     1457           IF SET-NAME SET generated literal contains garbage

     1460           Give error message if key is being subscripted

     1461           COMPUTE w/ 2-wd floating point gives wrong results

     1462           SEGMENT in place of SECTION can cause compiler
COBOL-74 V12C Documentation                                     Page 9
EXTERNAL CHANGES and OPTIONS


                     failure

     1463           Makes COPY REPLACING work if BY is not on same line.

     1464           Correction to edit 1450, flags syntax error on FREE

     1465           Declare word in phase D area of IMPURE for worker
                     in edit 1465

     1466           Error on WRITE stmt w/ ADVANCING or POSITIONING clause
                     if in non ASCII file

     1467           Resolve symbol ALCPA., as called by SCHIO2
                     after DBMS-20 V.6 edit 473.

     1470           Declare two fields as external for edit 1447 and 1451

     1471           First line of Page Head does not have <FF>.

     1472           Fix DIVIDE literal INTO dn1, dn2, etc.

     1473           Eliminate truncation warnings on moves involving
                     compiler-generated line/page counters

     1474           Correction to edit 1450 for the "FREE" verb

     1475    Correction to edit 1452 for the RESET code in
                     report writer

     1476           Bad table link with catastrophe in phase E
                     Correction to edit 1123

     1477           Adjust calculation of EPSILON to consider
                     decimal places of source

     1500           Put warnings out where HIGH or LOW VALUES
                     used with numeric fields

     1501           Put syntax error on alternate key if 
                     variable length

     1502           Put a warning out on any record which is
                     smaller than maximum record size

     1503           WRITE ADVANCING gets fatal error message
                     when no recording mode is specified

     1504           GETITM fails to compile in 68274 without
                     DBMS
     1505           68274 halts if '** End of copy libary text **'
                     inserted before 'COPY'

     1506           Have FIPS Flagger mark extensions in use of
                     figurative constants with numeric fields
COBOL-74 V12C Documentation                                    Page 10
EXTERNAL CHANGES and OPTIONS



     1507           Make handling of figurative constants more
                     consistent
     ********** NOTE
      Edits 1510-1512 did not make it into tape 7
      They have been copied down to tape 9

     1510            At MLAC1., don't use ac TD, it's needed later
                     JEH,16-DEC-83,SPR:NONE
                     A:SRC MOVGEN

     1511           Test for need of floating point correction factor
                     before test for rounding
                     JEH,19-DEC-83,SPR:20-19795
                     A:SRC EXPGEN

     1512           Set up proper "FROM" address for MOVN instruction
                     JSM,19-DEC-83,SPR:20-19649
                     A:SRC MOVGEN

     1513           Build second descriptor word correctly for fig.
                     const. passed as argument to subprogram

     1514           Shut off AMRGN. flag while matching PRVTOK
                     against TYPE codes

     1515           Restore core pointer (EAS1PC) before defining
                     implied indexes

     1516           Don't clear sort record area if file named
                     in 'same record area' clause

     1517           Fix line splitting for copy replacing

     1520           Give error if 'DEPENDING ON D-N' and D-N
                     requires a subscript

     1521           Use the device and PPN fields to find correct
                     libary file
      Edits 1510-1512 did not get into tape 7
      Moved here to get into tape 9

     1510            At MLAC1., don't use ac TD, it's needed later

     1511           Test for need of floating point correction factor
                     before test for rounding

     1512           Set up proper "FROM" address for MOVN instruction

     1522           Not applicable to V12C.

     1523           Put 'SUBPROGRAM' on listing file

     1524           Not applicable to V12C
COBOL-74 V12C Documentation                                    Page 11
EXTERNAL CHANGES and OPTIONS



     1525           Not applicable to V12C

     1526           Not applicable to V12C

     1527           Not applicable to V12C

     1530           Not applicable to V12C

     1531           Not applicable to V12C

     1532           Not applicable to V12C

     1533           Alternate keys getting error if record is variable
                     in length, fix edit 1501

     1534           Edit 1115 generates a bogus byte pointer, causing ILL MEM REF
                     on systems with one-word global byte pointers implemented.

     1535           Not applicable to V12C

     1536           Reset ac16 to curfil value before using it

     1537           Fix edit 1424, give error on COMP fields in ASCII record

     1540           Not applicable to V12C

     1541           Not applicable to V12C

     1542           Fixed conversion of moving sixbit to ascii in 
                     an if generation.

     1543           Fix edit 1411 to not give warning if ON SIZE ERROR
                     clause is used.

     1544           Not applicable to V12C

     1545           Not applicable to V12C.

     1546           Fix move of literal 000.0 to PIC 999V9.

     1547           Make DEC extension warnings print at the 
                     end of the listing.
     1550           Clear flags on literals in SETOPN.

     1551           Version 13 only

     1552           Version 13 only

     1553           Version 13 only

     1554           Version 13 only

     1555           Version 13 only
COBOL-74 V12C Documentation                                    Page 12
EXTERNAL CHANGES and OPTIONS



     1556           Version 13 only

     1557           Version 13 only

     1560           Clear the extend bit

     1561           Not applicable to 12C

     1562           Not applicable to 12C

     1563           Not applicable to 12C

     1564           Not applicable to 12C

     1565           Not applicable to 12C

     1566           Not applicable to 12C

     1567           Check to see that SAME AREA file names do not match
                     the first file.  Give E.174 if so.

     1570           Not applicable to 12C.

     1571           Not applicable to 12C.

     1572           Not applicable to 12C.

     1573           Not applicable to 12C.

     1574           Not applicable to 12C.
COBOL-74 V12C Documentation                                    Page 13
EXTERNAL CHANGES and OPTIONS


2.3                 OTS BUG FIXES SINCE LIBOL V12B(674)

         1000       SMU of relative file fails, falls into ISAM code

         1001       SMU of ISAM sometimes fails if block got split

         1002       Funct routine CBC fails if CORPT goes to 0 when overlays in use

         1003       If file closed w/ DGLGTE doesn't exist, next file to be closed is deleted

         1004       When trunc of COMP-1 field should produce 0, get weird neg number

         1005       CLOSE w/ DELETE fails on TOPS-10 if LSU w/ Monitor 7.01

         1006       Unable to REWRITE a non-null EBCDIC record

         1007       Read unconditional code for Rel 5 doesn't work

         1010       LOOKUP errors using ENTER arg block to determine error msg to print

         1011       Fixes 1005 CLOSE w/ DELETE after non-SMU open, output doesn't delete file

         1012       NON-BIS display of comp field with low-values is wrong

         1013       Sequential relative ASCII file null record in block
                     causes rest of block to be skipped.
         1014       Append extra <CR> to magtape files - match FCTC implementation
         1015       allow COMPT. UUO to return correct file statues errnum

         1016       Test for ISAM files when using CHECKPOINT EVERY n RECORDS

         1017       RESET ERRNUM when retrying to OPEN a busy RMS file

         1020       Test for use of CHECKPOINT with RMS files opened I-O

         1021       make READ NEXT return correct record as ANSI standard states

         1022       Deallocate memory if OPEN fails with RMS files

         1023       Make pointer go to the next record after a REWRITE

         1024       Make READ check for end of record by count rather than character

         1025       Test CORPT. as well as HLOVL. to decide whether core
                     can be freed

         1026       Reset buffer pointer before append FILOP.

         1027       Zero buffer location so RETAIN NEXT of L-V
                     key get right block number

         1030       Clear the SFD area when opening a SMU file
                     on an ersatz device from a SFD

COBOL-74 V12C Documentation                                    Page 14
EXTERNAL CHANGES and OPTIONS


         1031       Don't decrement byte/record count when finding
                     <CR><LF> in record

         1032       STRING/UNSTRING - the destination character
                     count is off by one

         1033    Do close abort on labeled mag tapes during
                     fatal error processing

         1034       Zero out unused data block area after delete

         1035       Make READ NEXT after DELETE on sixbit relative
                     not skipping record

         1036       Zero out right half of UOUT. after checkpointing

         1037       Change error message to "for OUTPUT only".

         1040       Fix output byte pointer for sixbit keys

         1041       Clear flags after multiply for SIZE ERROR

         1042       Fix if error on open of sequential file

         1043       Do not ignore end-of-file errors

         1044       Space-fill record area at file open

         1045       Use $MESSAGE in RMSGET as first RMS-20 call to
                     init RMS-20 global data symbols

         1046       Fix RMS CHECKPOINTING for DELETE and REWRITE

         1047       Dequeue locked record before job is aborted

         1050       Set D.LBN for relative files accessed randomly

         1051       Fix REWRITE after READ NEXT for relative file

         1052       Extend blocked sixbit files correctly

         1053       Gives correct error message

         1054       Makes Declarative work with SMU open

         1055       Extend blocked sixbit file correctly

         1056       Prevent DBMS code from being loaded with non DBMS progs
                     EGM, 9-Mar-83,SPR:20-18340

         1057       Correction to edit 1015 set correct value for error number

         1060       Fix UNSTRING to handle alpha source with leading
                     spaces going into numeric fields
COBOL-74 V12C Documentation                                    Page 15
EXTERNAL CHANGES and OPTIONS



         1061       Fix bytesize on open of MAGTAPE with
                     RECORDING MODE SIXBIT

         1062       If programs blocking factor doesn't equal index
                     file's factor, give run-time failure

         1063       Give warning for relative files under SMU if
                     FDB doesn't have max number

         1064       Get checkpointing of files inside implicit FREE

         1065       Make FREE RECORD KEY work for SMU after RETAIN NEXT

         1066       Add GJ.BLK, and GJ.ATR for long form GTJFN

         1067       Correction to edit 1065

         1070       Chg NUMS.7 table for NUMSTD=0 OTS' so numeric
                     digits will be converted

         1071       Zero out FS.EN before assembling error nbr
                     for file status 2

         1072       Don't turn on sign bit in word 2 if result
                     zero

         1073       Add call to $ERASE if RMS file closed with delete
         1074       Fix twos complement routine in ACEPT. routine

         1075       Prevent multi-level ISAM file from skipping records 
                     when using START, READ NEXT sequence

         1076       Add error handling routine in COBST for failure on
                     GET of OTS

         1077       Update pointers for current record, next record
                     last record if DYNAMIC access and REWRITE

         1100       Do checkpointing write for SMU records.(10-ONLY)

         1101       Fix LIBOL.CTL to properly save LIBO12.

         1102       Make edit 1007 conditional on monitor level

         1103       On Fake Read for SMU Retain on TOPS-10, check for
                     EOF Return and don't cause program failure if so.

         1104       Remove warning message to run seteof. set file
                     to maximum allowably byte count instead.

         1105       Put a '?' in front of warning to make it FATAL

         1106       Move the definition of RMS$10 from LIBSHR to COMUNI
COBOL-74 V12C Documentation                                    Page 16
EXTERNAL CHANGES and OPTIONS



         1107       (For non-BIS) In routine ADD.21, don't clear overflow
                     flags, just the carry flag which the routine tests on

         1110       Location of SNRBP. is zeroed out and caused error if
                     SMU is used with segmentation.

         1111       Delete edit 1106.

         1112       Don't put a <CR> at end of STD-ASCII mag tape file

         1113       Use procedure with filename-1 OPEN option.

         1114    Eliminate extra <CRLF> on Rewrite of ASCII Record

         1115       TOPS-10 7.02 system labeled tapes, fatal runtime
                     error message - DV.DIR bit now set
         1116       Reset file status before re-trying file open

         1117       Not applicable to V12C

         1120       Not applicable to V12C

         1121       Not applicable to V12C

         1122       Not applicable to V12C

         1123       Not applicable to V12C

         1124       Not applicable to V12C

         1125       Not applicable to V12C

         1126       Define feature test switch and code to print ascii
                     text files with blank lines
         1127       Remove obsoleted code from COBST.

         1130       Insert conversion factor in SEQIO read with 
                     external format of ASCII and internal format of
                     SIXBIT.

         1131       Not applicable to 12C.

         1132       Not applicable to 12C.

         1133       Not applicable to 12C.

         1134       LSU - Reset SU.FR flag if open fails

         1135       Not applicable to 12C.


         1136       Change error message for DEQ without ENQ.

COBOL-74 V12C Documentation                                    Page 17
EXTERNAL CHANGES and OPTIONS


         1137       Fix overlay lookups

         1140       Not applicable to 12C.

         1141       Not applicable to 12C.
COBOL-74 V12C Documentation                                    Page 18
EXTERNAL CHANGES and OPTIONS


2.5                 LIBARY BUG FIXES


Edit 31 Allow empty source modules in .lib files.


2.6                 ISAM BUG FIXES
         200        RESTORE .FBSIZE TO + INFINITY FOR COBOL-20

         201        DEVELOPMENT EDIT - SENT OUT WITH AUTOPATCH TAPE 5

         202        FIX ERROR MESSAGE SO ALL IS PRINTED

         203        PRINT KEY VALUE FOR DUP OR KEYS OUT OF ORDER MSG

         201        ALLOW A CONTROL-Z TO EXIT UTILITY

         204        PRINT RECORD CONTENT FOR KEYS OUT OF ORDER MSG AND
                     RECORD TOO SHORT MSG.

         205        DISPLAY ERROR MSG ACCORDING TO BIT SETTINGS OF FILE
                     STATUS.

         206        DO NOT DISPLAY COMMA AFTER LAST ERROR MESSAGE GENERATED

         207        FIX  205 TO WORK CORRECTLY.

         210        Fix  204 to work correctly.

         211        Fix reading of COBOL labels on tape
                    containing packed ISAM file

         212        Fix index block length calculation to
                    use two word headers rather than 1.


2.7                 COBDDT BUG FIXES

Note, This version of COBDDT will not  work  with  versions  of  COBOL
         prior  to  v12A.  The filename qualification feature will not
         work with versions of COBOL prior to v12B.

27 fix problem with step when breakpoints are cleared.


COBOL-74 V12C Documentation                                    Page 19
DEFICIENCIES


3.0                 DEFICIENCIES


3.1                 Deficiencies from COBOL v12 and v12A


     COPY REPLACING has some problems in that it is  not  possible  to
     replace either part of PIC xyz without replacing the whole.
     i.e.  REPLACING ==PIC S9(10)==
     will work
     but
     REPLACING ==PIC== or REPLACING ==S9(10)== will not.

     Note, it was never  the  intent  (and  it  contravenes  the  ANSI
     standard) for COPY REPLACING to replace part of a data-item.
     REPLACING AA by BB should not turn AA-XYZ into BB-XYZ.

     The LINK supplied with 7.00 for loading the monitor will not load
     COBOL-74 subroutines.  Use field image LINK for this case.
COBOL-74 V12C Documentation                                    Page 20
DEFICIENCIES


                               ********
                               * NOTE *
                               ********
     We do not recommend that this change  be  installed  unless  your
     installation  is  having  problems  transferring  data  TO an IBM
     machine.

     The ASCII to EBCDIC translation table was changed in  version  12
     (as  the  result  of  several  SPRs)  so  that the translation of
     graphics was more correct.   However  it  is  still  not  correct
     according  to  IBM  documentation, we are currently investigating
     wha t VAX does to see if there can be a DEC to  IBM  standard  we
     can  live  with.   However  it  seems  that  we now in some cases
     generate incorrect EBCDIC characters for minus zero.  The interim
     solution for those who see this problem is to put the translation
     t able back the way it was in version 11 knowing  then  that  the
     translation of some graphics will be wrong.
     In CHREQV.MAC change
     E 133,255 to E 133,340
     E 134,340 to 134
     E 135,275 to E 135,320
     E 136,137 to 136
     E 140,171 to 140
     E 175,320 to E 175,260
     E 176,241 to 176

     and before CAE insert
     DSAE 134,155
     DSAE 136,117
     DSAE 140,174
     DSAE 176,155

COBOL-74 V12C Documentation                                    Page 21
DEFICIENCIES


3.2                 Deficiencies from before COBOL v12


     Program ID same as filename, procedure name or data name  results
     in spurious error messages.

     If A=B and C=D or E for subscripted A and  C  gives  wrong  code,
     cause "SUBSCRIPT not POSITIVE" run time message if subscripts not
     COMP or INDEX.

     Error not detected.
     A RESET FINAL clause is legitimate only when FINAL is given as  a
     control.   Violation  of  this  rule  goes  undiagnosed.  A RESET
     clause  can  only  accompany  a  sum  clause.   A  RESET   clause
     accompanying a source clause receives no diagnostic.

     Incorrect error message.
     DATA-NAME RC which is defined on last line of the working-storage
     section is incorrectly diagnosed as undefined in the declaratives
     area of procedure division.  It is considered to be defined ok in
     the report section, however.

     Incorrect error message.
     COBOL rules make the presence of  a  data-name  optional  in  the
     control  footing  report description provided there is no need to
     reference the report group.  In the case where the  data-name  is
     present  the  program  compiles without error.  In the case where
     the data name is not present the compiler seems to be disallowing
     sections in the procedure division.

     DBMS error handling
     Errors which relate to the schema are not tabulated in the  error
     count, and they go only to the TTY.

     If "USE AFTER ERROR PROCEDURE ON x" where x is  "INPUT",  "OUTPUT
     or  "I-O"  and  "USE AFTER ERROR PROCEDURE ON file-name" are both
     specified, then file-name may not be OPENed for x.

     User error is not diagnosed:  When the value of an 88-level  item
     is  not the correct class, and the item is subordinate to a group
     item which has the clause "USAGE INDEX", the program will compile
     without an error diagnostic.
COBOL-74 V12C Documentation                                    Page 22
DEFICIENCIES


4.0                 Installation Instructions


See  the  COBOL-74  Installation  Guide   (COBOL.INS)   for   complete
installation instructions.



5.0                 INTERNAL CHANGES


5.1                 I/O Performance Metering




[END OF FILE CBL12C.DOC]