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

 Message        Invalid argument to __declspec.  Valid arguments are
                "thread" or "__thread".

 Description    The only valid arguments to the __declspec storage
                class modifier are "thread" or "__thread".

 User Action    Either use one of the valid arguments, or remove the
                storage class modifier.