z/OS V1R6.0 DFSMS Access Method Services for Catalogs

Invoking from Programbytes) with a physical sequential organization. The processor does not test forthe existence of the data set, except for the REPRO command withOUTDATASET.2. The user must know the data format so that the routine can be coded for thecorrect type of input and format the correct type of output.3. Each user routine must handle errors encountered for data sets it is managingand provide a return code to the processor in register 15. The processor usesthe return code to determine what it is to do next.The permissible return codes are:Code Meaning0(0) Operation successful.4(4) End of data for a GET operations.8(8) Error encountered during a GET/PUT operation, but continueprocessing.12(C) Error encountered during GET/PUT operation; do not allow anyfurther calls (except CLOSE) to this routine.Figure 32 on page 429 shows the argument list used in communication between theuser I/O routine and the access method services processor. The user I/O routine isinvoked by the processor for OPEN, CLOSE, GET, and PUT routines.428 z/OS V1R6.0 DFSMS Access Method Services for Catalogs