Synchronous request

After a synchronous request, or a CHECK or ENDREQ macro, the return code in register 15 indicates if the request completed successfully. Table 1 describes each return code returned in register 15.

Table 1. Return code in register 15 after a synchronous request. Return code in register 15 after a synchronous request
Return code (RPLRTNCD)	Meaning
0(X'0')	Request completed successfully.
4(X'4')	Request was not accepted because the request parameter list indicated by the request (RPL=address) was active for another request.
8(X'8')	Logical error; specific error is indicated in the RPL feedback area.
12(X'C')	Physical error; specific error is indicated in the RPL feedback area.