gdattim = list in GDPLOT2 path error

[mjames-upc]

    GEMPAK-GDPLOT2>gdattim = list
    GEMPAK-GDPLOT2>r
    Number of times =            1
           1  

    PARAMETERS FOR GDPLOT : FRAME NUMBER  1 INITIAL PLOT SETTINGS -
    GDFILE=rtma, GDATTIM=
    GAREA=co, PROJ=SAT, MAP=1, LATLON=
    PANEL=0, TITLE=1
    OVERLAY  TYPE       LEVEL           VCORD       GRID FUNCTION
        1    C          2               HGHT        TMKF
    [FL -1]  Cannot open file /data/ldm/gempak/model/rtma/20.
    [DM -2]  File /data/ldm/gempak/model/rtma/20 cannot be opened.
    [GD -2]  File /data/ldm/gempak/model/rtma/20 cannot be opened.
    Parameters requested: GDFILE,GDATTIM,GLEVEL,GVCORD,PANEL,SKIP,SCALE,GDPFUN,
    TYPE,CONTUR,CINT,LINE,FINT,FLINE,HILO,HLSYM,CLRBAR,WIND,REFVEC,TITLE,TEXT,
    CLEAR,GAREA,IJSKIP,PROJ,MAP,MSCALE,LATLON,DEVICE,STNPLT,SATFIL,RADFIL,
    IMCBAR,LUTFIL,STREAM,POSN,COLORS,MARKER,GRDLBL,FILTER.
    GEMPAK-GDPLOT2>