PH51968: File I/O problems when a program is called multiple times for AMODE64

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• File related structures set up and code generated by the
  compiler for an LP(64) program are incorrect leading to the
  structures only being initialized correctly the first time the
  program is called.
  
  This can lead to various problems at runtime, such as abend
  SC03.
  
  This does not affect LP(32) programs.
  

Local fix

• In some contexts, the file use can be isolated in a separate
  module that's entered only once.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL 6.4 compiling and  *
  *                 running programs with the LP(64) option in   *
  *                 effect where the programs contain file I/O   *
  *                 operations and are also called more than     *
  *                 once during the life of a run unit.          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Runtime abend (typically SC03 or S0C4)  *
  ****************************************************************
  * RECOMMENDATION: Apply the IBM-provided PTF                   *
  ****************************************************************
  Programs compiled with the LP(64) option require special
  handling of the static initialization of various runtime-managed
  file control block fields due to the fact that in such programs
  the fields do not reside in the Writable Static Area (WSA), as
  in programs compiled with the LP(32) option in effect. In some
  cases, these initializations were being incorrectly performed
  multiple times when a program is called multiple times during
  the life of the run unit.
  

Problem conclusion

• The compiler was updated to fix the problem of repeated static
  initialization of file control block fields in programs compiled
  with the LP(64) option in effect.
  

Temporary fix

Comments

APAR Information

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

  PH50670

• 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 IGYCJBLD IGYCJGEN 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  IGYQSPLT IGYZQEN6 IGYZQENU IGYZQJP6
  IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R640 PSY UI90218

     UP23/01/26 P F301

• R641 PSY UI90219

     UP23/01/26 P F301

• R642 PSY UI90220

     UP23/01/26 P F301

• R64H PSY UI90221

     UP23/01/26 P F301

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.