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

 Message        Unusual ldgp requires a .s file

 Description    This indicates that a ldgp pseudo-instruction was
                encountered in an unusual place or with unusual
                arguments.  The assembler will be invoked on the .s
                file.

 User Action    Correct the asm directive.