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

 Message        The type of the tentatively-defined array "<name>" is
                incomplete at the end of the compilation unit.  The
                compiler will assume one array element.

 Description    The C standard requires that the type of all
                tentative definitions must be completed before the
                end of the compilation unit.  For compatibility with
                some other C compilers, Compaq C will give the array
                one element.

 User Action    Complete the type.