z/OS Communications Server: SNA Programmer's LU 6.2 Guide
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Using APPCCMD CONTROL=RECEIVE, QUALIFY=SPEC|ISPEC

z/OS Communications Server: SNA Programmer's LU 6.2 Guide
SC27-3669-00

The APPCCMD CONTROL=RECEIVE, QUALIFY=SPEC|ISPEC macroinstructions receive normal information from a specific conversation. When this macroinstruction is issued, a conversation identifier must be specified, and only incoming information for that conversation can be received.

The QUALIFY=SPEC macroinstruction causes VTAM® to copy the data from the conversation specified by the CONVID parameter to the area specified by the AREA parameter. The conversation can be in continue-any or continue-specific mode. The AREALEN parameter specifies the length of the data area. If no data is ready to be received on the conversation, VTAM queues the macroinstruction until the data arrives.

The QUALIFY=ISPEC macroinstruction receives normal information that is immediately available from a specified conversation. The conversation can be in continue-any or continue-specific mode. When this macroinstruction is issued, VTAM copies all normal information that is immediately available into the supplied data area or control block specified by the AREA parameter. VTAM does not wait for additional information before completing this macroinstruction. VTAM issues an RCPRI, RCSEC combination of X'0000', X'0008', NO_INFORMATION_IMMEDIATELY_AVAILABLE.

If the application program is managing several independent conversations simultaneously, these macroinstructions would have to be issued for each conversation in order to receive information for that conversation.

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