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

 Message        Conflicting required uses of register(s):  <text>

 Description    The special linkage associated with a function has
                specified that one of the standard calling convention
                registers be used in a nonstandard way without also
                replacing its standard use with another register.  An
                example would be a function that returns an int value
                using a special linkage that states R0 is not used,
                and does not specify another register to hold the
                return value.

 User Action    Correct the #pragma linkage directive that specifies
                the special linkage.