Restrictions

IXCRECV with REQTYPE=BLOCKING cannot be used by tasks higher in the task tree than the cross memory resource owning task (the top, or first, job step task in the address space).

Callers running in SRB mode should refrain from invoking the IXCRECV service with REQTYPE=BLOCKING under the following circumstances:

After the SRB receives a x'47B' abend
When running in a suspend exit after invoking SUSPEND

In these cases, the IXCRECV service routine might not be able to successfully wait for the requested responses to arrive.