VMS Help CC, Messages, ASMREGOVRLAPSC  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        Destination register overlaps input for <text>
                (software completion) instruction

 Description    An asm directive contains an instruction that may
                require a software completion routine in case of a
                runtime exception.  Such an instruction requires that
                the result register be different than any input
                register.

 User Action    Modify the asm so that the destination register is
                different than the sources.