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

 Message        Compilation will proceed without feedback
                optimizations

 Description    A condition has occurred that has prevented the
                compiler from using feedback optimizations.  This
                message is most often preceded by another message
                that will provide additional information.

 User Action    Correct the condition that prevented the feedback
                optimizations.