PH39556: Invalid numeric results using INVDATA(,NOCLEANSIGN)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• For some intermediate results involving an unsigned operand,
  compiled code inadvertently makes the result unsigned, leading
  to an invalid result.
  

Local fix

• Apply the June 2021 compiler PTF, which doesn't suffer from the
  problem.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL 6.2 compiling and  *
  *                 running programs compiled with the           *
  *                 INVDATA(...,NOCLEANSIGN) option in effect,   *
  *                 and where the program contains a COMPUTE     *
  *                 statement satisfying the following           *
  *                 conditions:                                  *
  *                 1) There is a subtraction operation in the   *
  *                 COMPUTE expression involving operands that   *
  *                 are either packed or zoned decimal;          *
  *                 2) In the COMPUTE expression, the next       *
  *                 operation to be performed after the          *
  *                 subtraction is an addition operation;        *
  *                 3) One of the operands in the subtraction    *
  *                 operation is a literal;                      *
  *                 4) During execution of the COBOL program,    *
  *                 the subtraction operation produces a         *
  *                 negative result.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect result.                       *
  ****************************************************************
  * RECOMMENDATION: Apply the IBM-provided PTF.                  *
  ****************************************************************
  The compiler was inadvertently setting the sign nibble of the
  subtraction operation to x'C' after the intermediate
  computation.
  

Problem conclusion

• The compiler was updated to ensure that the sign nibble of the
  subtraction operation in this scenario is not cleaned at
  intermediate steps.
  

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:

  PH40824

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 IGYCLIBH IGYCLIBO IGYCLIBR IGYCLSTR IGYCLVL0
  IGYCLVL1 IGYCLVL2 IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOPI  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  IGYZQDRV IGYZQENU IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R620 PSY UI76842

     UP21/08/27 P F108

• R621 PSY UI76843

     UP21/08/27 P F108

• R622 PSY UI76844

     UP21/08/27 P F108

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.