Sometimes the situation arises when the calling processor wants to receive the working space of the called processor intact; it may for instance contain a large error matrix which one does not want to be copied into a bank just in case it may be needed.
This request is done in the calling processor
by setting status-bit 15 into the down call bank,
ie. CALL SBIT1 (IQ(LQDW),15).
JZOUT will see this flag, it will reset it to zero, and it will leave the working space unchanged.