Additional PL/I condition handling considerations

Keep the following additional PL/I condition handling considerations in mind:

Non-PL/I conditions of severity 0 or 1 are not promoted to ERROR.
Promoting any non-PL/I condition to a PL/I condition is prohibited.
Raising a PL/I condition using the CEESGL callable service is prohibited.
Issuing a call to CEEMRCR from within a PL/I ON-unit to move the resume cursor is prohibited. But, you can move the resume cursor by using CEEMRCR from within a Language Environment user-written condition handler.