Description

   This routine produces a text message on the stderr device
   (Tru64 UNIX systems) or SYS$ERROR device (OpenVMS systems) that
   describes the exception whose exception object is specified in
   the exception argument.

   In a program that uses status exceptions, use this routine within
   a CATCH or CATCH_ALL code block to produce the message associated
   with a caught exception. Note that any exception objects set to
   the same status value are considered equivalent by the Threads
   Library.