PH04979: THE CBL COMPILER MAY TRUNCATE THE BINARY VALUE TO MATCH ITS PICTURE CLAUSE BEFORE A COMPARISON.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The compiler was assuming that binary data would be valid and
  wouldn't exceed the picture clause, so it could be truncated
  before a comparison without affecting the results.
  
  The compiler was fixed to provide compatibility with COBOL V4.2
  and earlier, even when invalid data was used, by not truncating
  binary data before a comparison any more than COBOL V4.2 would
  truncate (e.g. to match the size of the COMP-3 or USAGE DISPLAY
  data being compared against).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V5.2 using         *
  *                 TRUNC(STD|OPT) comparing BINARY/COMP/COMP-4  *
  *                 data items to USAGE DISPLAY or COMP-3 data   *
  *                 items where the binary data item contains a  *
  *                 value larger than its picture clause and     *
  *                 the COMP-3 or USAGE DISPLAY data item has    *
  *                 more digits specified in its picture clause  *
  *                 than the binary data item.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The compiler may truncate the binary    *
  *                      value to match its picture clause       *
  *                      before a comparison. If the data item   *
  *                      contains a value exceeding its picture  *
  *                      clause, the comparison may have a       *
  *                      different result than Enterprise COBOL  *
  *                      V4.2 and earlier.                       *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF and use ZONEDATA(MIG) *
  *                 if you previously used NUMPROC(MIG) in       *
  *                 COBOL V4.2 and earlier, or ZONEDATA(NOPFD)   *
  *                 otherwise.                                   *
  ****************************************************************
  The compiler was assuming that binary data would be valid and
  wouldn't exceed the picture clause, so it could be truncated
  before a comparison without affecting the results.
  

Problem conclusion

• The compiler was fixed to provide compatibility with COBOL V4.2
  and earlier, even when invalid data was used, by not truncating
  binary data before a comparison any more than COBOL V4.2 would
  truncate (e.g. to match the size of the COMP-3 or USAGE DISPLAY
  data being compared against).
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  PH06040 PH07210

Modules/Macros

• IGY8RWTU IGYCBE   IGYCCBE  IGYCCICS IGYCCSRV IGYCDGEN IGYCDIAG
  IGYCDMAP IGYCEN$0 IGYCEN$1 IGYCEN$2 IGYCEN$3 IGYCEN$4 IGYCEN$5
  IGYCEN$8 IGYCEN$D IGYCEN$R IGYCFGEN IGYCFREE IGYCINIT IGYCJA$0
  IGYCJA$1 IGYCJA$2 IGYCJA$3 IGYCJA$4 IGYCJA$5 IGYCJA$8 IGYCJA$D
  IGYCJA$R IGYCLIBH IGYCLIBO IGYCLIBR IGYCLSTR IGYCLVL0 IGYCLVL1
  IGYCLVL2 IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOSCN IGYCPGEN IGYCRCTL
  IGYCRDPR IGYCRDSC IGYCREAL IGYCRWT  IGYCSCAN IGYCSIMD IGYCUE$0
  IGYCUE$1 IGYCUE$2 IGYCUE$3 IGYCUE$4 IGYCUE$5 IGYCUE$8 IGYCUE$D
  IGYCUE$R IGYCXREF IGYECWI  IGYMSGE  IGYMSGK  IGYMSGT
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655W3200

Applicable component levels

• R520 PSY UI60238

     UP18/12/18 P F812

• R521 PSY UI60239

     UP18/12/19 P F812

• R522 PSY UI60240

     UP18/12/19 P F812

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.