Regarding LPSW / LPSWE: The POp is correct.
* A z/Architecture PSW is 16 bytes. * The operand of LPSWE is 16 bytes. * The operand of LPSW is 8 bytes from which a 16 byte PSW is formed. Thus you cannot provide a 16-byte PSW via LPSW. A specific case where you need LPSWE rather than LPSW is for an instruction address >= 2G. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN