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

 Message        <Context> the size of "<expression>" exceeds the
                implementation's limit of 2147483647 bytes on the
                size of a function argument.

 Description    The size of a function argument exceeds the Compaq C
                implementation limit.

 User Action    Either reduce the size of the argument or consider
                passing it by reference.