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

 Message        The assertion "<assertion>" was not true, <reason>.

 Description    The expression in a #pragma assert
                non_zero(expression) directive was found to be zero.

 User Action    Correct the condition that caused the expression to
                be zero.