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Conference clt::cobol

Title:VAX/DEC COBOL
Notice:Kit,doc,performance talk info-->DIR/KEY=KIT or DOC or PERF_TALK
Moderator:PACKED::BRAFFITT
Created:Mon Feb 03 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3250
Total number of notes:13077

3193.0. "Default current/check=all, occurs, decinv??" by KERNEL::PULLEY (Come! while living waters flow) Wed Feb 05 1997 07:16

Hi,

The program below, on OpenVMS v7.1 Alpha, Cobol v2.4-863--well I'm not sure
if it should do this but...

This is when compiling the program /check=all, (or decimal).
If I make H-PURC, not subscripted, or take off the default current, it's fine.
If I leave it as is and run it I get:-
PURC=
%SYSTEM-F-DECINV, decimal invalid operand, PC=0000000000030160, PS=0000001B
%TRACE-F-TRACEBACK, symbolic stack dump follows

Now if the array is meant to be initialised implicitly, then it probably
is trying to put something as a default into that field, which it won't like.
But, if arrays aren't initialised, I'd expect other variables not to be also.
Current workaround is cobol/check=(all,nodecimal)...
Took a look through the DEC Cobol users manual 11.2.5, but only got this far.

Thanks for any comments/suggestions,
Steve.

IDENTIFICATION DIVISION.
PROGRAM-ID. HMTEST.
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
DATA DIVISION.
FILE SECTION.
WORKING-STORAGE SECTION.
01  H-FIELDS.
   02  H-FILLER OCCURS 30.
     03  H-PURC                  PIC 999.


PROCEDURE DIVISION.

MAIN SECTION.
LA-1.
      DISPLAY "PURC="           LINE 7 COLUMN 1 ERASE LINE.
      ACCEPT H-PURC (1)   LINE 7 COLUMN 10 
                                PROTECTED NO BLANK CONVERSION DEFAULT CURRENT.
LA-999.
     STOP RUN.
T.RTitleUserPersonal
Name		DateLines
3193.1More info on /CHECK=DECIMALPACKED::BRAFFITTWed Feb 05 1997 09:2148
>Now if the array is meant to be initialised implicitly, then it probably
>is trying to put something as a default into that field, which it won't like.
    
    The DECINV occurs on the ACCEPT.
    
    DEC COBOL's /CHECK=DECIMAL is more complete for DISPLAY numeric data
    than the decimal data checking you get by default with VAX COBOL and
    the VAX hardware.  For example, there is no decimal data validation
    with VAX COBOL for this particular ACCEPT.
    
    The DEC COBOL User Manual compatibility chapter has this information on
    /CHECK=DECIMAL:

      The results of numeric comparisons with VAX COBOL and DEC COBOL are
      undefined with invalid decimal data.  DEC COBOL includes the
      /CHECK=DECIMAL and -check decimal features to do a more complete
      analysis of invalid decimal data. These options can be particularly
      helpful when you are migrating programs to DEC COBOL.
    
    If you do an ADD before the ACCEPT, you can see better what is
    happening (both DEC COBOL /CHECK=DECIMAL and VAX COBOL give DECINV on
    the ADD):
    
IDENTIFICATION DIVISION.
PROGRAM-ID. HMTEST.
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
DATA DIVISION.
FILE SECTION.
WORKING-STORAGE SECTION.
01  H-FIELDS.
   02  H-FILLER OCCURS 30.
     03  H-PURC                  PIC 999.

PROCEDURE DIVISION.

MAIN SECTION.
LA-1.
	DISPLAY "***C3193***".
	ADD 0 TO H-PURC (1).
      DISPLAY "PURC="           LINE 7 COLUMN 1 ERASE LINE.
      ACCEPT H-PURC (1)   LINE 7 COLUMN 10 
                                PROTECTED NO BLANK CONVERSION DEFAULT CURRENT.
	DISPLAY "***END***".
LA-999.
     STOP RUN.
3193.2Thanks.KERNEL::PULLEYCome! while living waters flowWed Feb 05 1997 14:525
    So DEC Cobol's checking is more complete than VAX Cobol.
    Do I take ti that, the difference between a subscripted field, (where
    the decinv errors is triggered), and a nonsubscripted field, (where
    there's no error), is just part of the undefined results the
    manual mentions.
3193.3See VAX/DEC COBOL User Manual (p. 5-18/-19)PACKED::BRAFFITTWed Feb 05 1997 15:1018
>    Do I take ti that, the difference between a subscripted field, (where
>    the decinv errors is triggered), and a nonsubscripted field, (where
>    there's no error), is just part of the undefined results the
>    manual mentions.
    
    There is a good table which shows the default initial value for various
    classes of data items.
    
      DEC COBOL V2.3 User Manual (p. 5-19)
      VAX COBOL V5.4 User Manual (p. 5-18)
    
    	Data Item Type	 Default Initial Value
    	--------------------------------------
    	Numeric		 Zero
    	Index-name	 Occurrence number one
    	Index data item	 Undefined
    	Tables		 Undefined
    	All others	 Spaces