/sys$common/syshlp/helplib.hlb CC, Messages, PARMSTORCLS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> a parameter has an explicit storage class
                other than "register".

 Description    The only storage class that can be specified for a
                formal parameter is "register".

 User Action    Either remove the storage class or use "register" if
                that is desired.