z/OS MVS Programming: Writing Transaction Programs for APPC/MVS
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Calling Error_Extract for Asynchronous Requests

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

To return error information for an asynchronous call to a conversation service, your TP should call Error_Extract immediately after:
  • The TP receives an error return code from APPC/MVS, or
  • The system posts the event control block (ECB) that indicates the completion of the service.

Your TP should not call any other APPC/MVS services for the same conversation until the ECB is posted (indicating completion of the asynchronous service).

The following section shows an example of how to call Error_Extract for an asynchronous request. See Using Asynchronous Services for detailed information about asynchronous processing for conversation callable services.

Parent topic: Using Error_Extract for Synchronous and Asynchronous Calls

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