      SUBROUTINE SAVE_UVAR_GRID( uvar, uvgrid, uvdtype, dset )
*
*  This software was developed by the Thermal Modeling and Analysis
*  Project(TMAP) of the National Oceanographic and Atmospheric
*  Administration's (NOAA) Pacific Marine Environmental Lab(PMEL),
*  hereafter referred to as NOAA/PMEL/TMAP.
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*

* store the grid that has been determined to be correct for this
* uvar (a LET expression), when evaluated in the given dset

* V699 5/16 *sh* new routine created to avoid the 2d uvar_grid array
* V720: 6/17 *acm* Fix ticket 2547: We store the grid and type of user variables and
*                  expressions, but the grid and type may be determined on different 
*                  iterations in is_uvar_grid.

        include 'ferret.parm'
        include 'tmap_dims.parm'
        include 'xvariables.cmn'

* calling argument declarations
        INTEGER uvar, uvgrid, uvdtype, dset

* internal variable declarations
        INTEGER NCF_SET_UVAR_GRID,
     .          c_list_dset, context_dset, 
     .          pretype, savetype, status

* c_list_dset  - dset value relevant in C LIST structures of NCF_Util.c
* context_dset - dset for which grid of this uvar has been determined

        IF ( uvar_dset(uvar) .GT. pdset_irrelevant) THEN
* ... LET/D= variable
          c_list_dset  = uvar_dset(uvar) ! the dset that owns this LET/D
          context_dset = uvar_dset(uvar) ! only one dset is possible
        ELSE
* ... global LET variable
          c_list_dset  = pdset_uvars  ! fake dataset of global uvars
          context_dset = dset
        ENDIF

* We may have already stored the uvar type.  Check for that.

	savetype = uvdtype
	CALL GET_SAVED_UVAR_DTYPE( uvar, dset, pretype )
	IF (pretype .NE. unspecified_int4 .AND. 
     .      pretype .NE. ptype_unknown) savetype = pretype

* store the grid
        status = NCF_SET_UVAR_GRID( c_list_dset, uvar,
     .                              uvgrid, savetype, context_dset )

* Note that an ATOM_NOT_FOUND error is not trapped
* We should really trap it and call ERRMSG(ferr_internal)

        RETURN
        END
