Return_Values

   x                  A message catalog file descriptor. Indicates
                      the call was successful. This descriptor is
                      used in calls to catgets and catclose.
   (nl_catd) -1       Indicates an error occurred. The function sets
                      errno to one of the following values:

                      o  EACCES - Insufficient privilege or file
                         protection violation, or file currently
                         locked by another user.

                      o  EMFILE - Process channel count exceeded.

                      o  ENAMETOOLONG - The full file specification
                         for message catalog is too long

                      o  ENOENT - Unable to find the requested
                         message catalog.

                      o  ENOMEM - Insufficient memory available.

                      o  ENOTDIR - Part of the name argument is not
                         a valid directory.

                      o  EVMSERR - An error occurred that does not
                         match any errno value. Check the value of
                         vaxc$errno.