STEP

Executes the next instruction in the target program.

If the STOPNOP option is OFF or the NOSTOPNP option is ON, then IDF does not stop on NOP and NOPR instructions that follow BAL, BALR, BAS, and BASR instructions.

Step works by establishing a breakpoint at the next instruction which is immediately reset once reached. If an Execute instruction has the immediately following instruction as its target, then single-stepping from the EX will fail (see BREAK for information about how breakpoints are established).

For more details see Controlling single-stepping your program

Return codes

0

Next instruction is executed when macro exits

6

Single-step mode locked out pending execution of startup command