PH19232: WHEN "SET TO FALSE" CLAUSE USED AGAINST NEGATIVE NUMBERS IT GIVES A WRONG OUTPUT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When "SET TO FALSE" clause used against negative numbers it
  gives a wrong output.
  
  Sample code :
  ============================================================
  
  05 VAR_A PIC S9.
   88
  VAR_A_OK VALUE ZERO
   WHEN SET TO FALSE IS -1.
  
  Results :
  
  The
  expected results should be -1 instead the result is 0.
  ============================================================
  

Local fix

• Local Fix is to change VALUE ZERO to VALUE 0.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V6.3 compiling and *
  *                 running programs that contain the newly      *
  *                 added features of WHEN SET TO FALSE and SET  *
  *                 xxx TO FALSE with a condition-name           *
  *                 definition that has a figurative constant    *
  *                 for the true value.                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: After a SET CN TO FALSE statement the   *
  *                      conditional variable CV1 has the true   *
  *                      value and not the FALSE value if the    *
  *                      condition-name is defined something     *
  *                      like this:                              *
  *                       05 CV1 PIC S9.                         *
  *                       88 CN VALUE ZERO                       *
  *                                                              *
  *                       WHEN SET TO FALSE IS -1.               *
  *                      and this SET is executed:               *
  *                       SET CN TO FALSE                        *
  ****************************************************************
  * RECOMMENDATION: Install the provided PTF and recompile.      *
  ****************************************************************
  The compiler was getting confused by the figurative constant
  since there were some bits that did not get reset for the WHEN
  FALSE phrase.
  

Problem conclusion

• The compiler was changed to reset the bits for condition-names
  before the WHEN FALSE processing, and now the SET statement
  executes with correct results after recompile.
  

Temporary fix

Comments

APAR Information

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

  PH18368

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

Modules/Macros

• IGY8RWTU IGYCASMB IGYCCBE  IGYCCCRT 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 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 IGYDRV   IGYEQCWI IGYMSGE  IGYMSGK  IGYMSGT  IGYQCBE
  IGYQSPLT IGYZQEN6 IGYZQENU IGYZQJP6 IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R630 PSY UI66646

     UP19/12/04 P F912

• R631 PSY UI66647

     UP19/12/04 P F912

• R632 PSY UI66648

     UP19/12/04 P F912

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.