!=====================================================================
! NGER: Seter, A Centralized Error-Handling Package for NCAR Graphics
!=====================================================================
!
! Seter package is used for error-handling by NCAR Graphics utilities.
!
! ~~~~~~~~~~~~~~~~~~~~~~~~~~
! Eerror-Handling Routines
! ~~~~~~~~~~~~~~~~~~~~~~~~~~
!
! NG_ICLOEM: Returns the index of the last non-blank character
! NG_SETER : Routine is called when an error occurs
!
! NG_ENTSR : Returns the current value of the recovery
! NG_RETSR : Restores a saved value of the recovery flag
! NG_EPRIN : Prints the current error message
! NG_ERROF : Turns off the error flag
!
! NG_NERRO : Returns the current value of the error flag (fct)
! NG_SEMESS: Returns the requested portion of the error message (fct)
! NG_ICLOEM: Returns the actual length of the error message (fct)
!
! NG_FDUM  : Optional dummy subprogram argument of NG_SETER, called by
!            NG_SETER when a fatal error is being processed and a STOP
!            is about to be executed.
!
!=====================================================================
! Refer "NCAR menu" for interfacing SETER in detail
!=====================================================================