The &SYSPCMD and &SYSSCMD control variables are interdependent. Following the initial invocation, the values of &SYSPCMD and &SYSSCMD depend on the TSO/E command or subcommand most recently executed. For example, if the value of &SYSSCMD is EQUATE, a subcommand unique to the TEST command, the value of &SYSPCMD is TEST.

You can use &SYSPCMD and &SYSSCMD in error and attention exits to determine where the error or attention interrupt occurred.