Requirements for TPs in Problem-Program State

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, except for the buffer parameter of the Send_Data, Extract_Information, Receive_and_Wait, and Receive_Immediate services, which may reside in another address space or data space.

If you are writing a TP to run in problem-program state, you can skip over General Requirements and continue reading at Features of APPC/MVS for All TPs.