Setting up the request block extension

The RBX consists of fields in which you provide information about your request, and into which the system stores information about the success of the request. The following table indicates the fields into which you must place a value and those that the system uses to return information.

RBX Fields That You Must Initialize	RBX Fields Into Which the System Returns Information
S99EID S99EVER S99EOPTS S99ESUBP S99EKEY S99EMGSV S99ECPPL	S99ENMSG S99ERCO S99ERCF S99EWRC S99EMSGP S99EERR S99EINFO S99ERSN

The request block extension must begin on a fullword boundary. Mapping macro IEFZB4D0 assigns it a DSECT name of S99RBX. It contains the following fields (the names in parentheses are those assigned by IEFZB4D0):