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

 Message        <Context> "<expression>" has const-qualified type,
                but occurs in a context that requires a modifiable
                lvalue.

 Description    The code has attempted to modify an object that is
                either a const-qualified type or has been declared
                with the readonly storage-class modifier.  This is
                not valid.  A typical example is assigning a value to
                a const variable.

 User Action    Either remove the const qualifier from the object's
                type, remove the readonly storage-class modifier from
                the object declaration, or rework the code so that
                the object is not written to.