z/OS MVS Programming: Writing Transaction Programs for APPC/MVS
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Requirements for TPs in Problem-Program State

z/OS MVS Programming: Writing Transaction Programs for APPC/MVS
SA23-1397-00

The following requirements apply to TPs that are written to run in problem-program state:
  • APPC/MVS services must be invoked in 31-bit addressing mode
  • All parameters of APPC/MVS services must be addressable by the caller and in the primary address space.

If you are writing a TP to run in problem program state, you can skip over General Requirements and continue reading at Calling CPI Communications Routines.

Parent topic: Transaction Program (TP) Environment

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