The return code specifies the general result of the callable service. Appendix A. ICSF and TSS Return and Reason Codes lists the return codes.

The reason code specifies the result of the callable service that is returned to the application program. Each return code has different reason codes assigned to it that indicate specific processing problems. Appendix A. ICSF and TSS Return and Reason Codes lists the reason codes.

This field is ignored. It is recommended to specify 0 for this parameter.

This field is ignored.

The number of keywords you are supplying in the rule_array parameter. The rule_array_count parameter must be 0 since no keywords are currently defined for this callable service.

The rule_array contains keywords that provide control information to the callable service. There are no rule_array keywords currently defined for this callable service.

This parameter specifies the length of the buffer passed with the opt_blocks parameter. This length is used to determine if it would overflow the buffer size when adding a new optional block to the current contents of the buffer.

This parameter specifies the actual length of the set of optional blocks currently contained in the opt_blocks buffer. On output, it is updated with the length after the callable service has added the new optional block.

This parameter specifies a buffer containing the set of optional blocks being built. In the first call, it will generally be empty. The callable service will append one optional block to the buffer with each call. Parameter opt_blocks_bfr_length specifies the total length of this buffer, and an error will be returned if this length would be exceeded by adding the optional block in parameter opt_block_data to the current contents. This parameter is encoded in ASCII on both input and output.