If the record could not be added after the U_PREPARE call, the user edit
routine is called with the type parameter set to U_FILEFULL. All
the other parameters are NULL. This call informs the user edit routine
that the RMSfile is full, and it will not be possible to add records to the
file. If any changes were made to other files when the U_PREPARE call
was made, those changes should be removed at this time. If the U_FILEFULL
user edit routine returns an error message, form displays it, otherwise, a file
full message is displayed. In either case, the STORE is not completed.
U_FILEFULL allows the user edit routine to handle additions to the RMSfile correctly even when the RMSfile is full, and no more records can be added.