Thread Interaction With Run Units

The following rules apply to the interaction of threads with run units:

  1. The CHAIN and CALL PROGRAM statements normally act as if the program does a STOP RUN followed by the beginning of a new run unit. The implied STOP RUN destroys all threads other than the one executing the CHAIN or CALL PROGRAM statement.
  2. If you have more than one thread running, you may not start a nested run unit (accomplished with the CALL RUN statement).