START is used to start a new task. It is a interval control command. XCTL is used to pass control to a program within the same task. It is a program control command.
Minimum, Standard, FULL
To provide the control and services of the DB/DC system
In COBOL II start with CEBR, and get the offset/instruction.
Language interface and call parameters
Check EIBRESP after the call or use the HANDLE condition.