Dear all, Can somebody figure out why "unknown netCDF error code: -1" comes out from the following script? use "http://opendap.aviso.oceanobs.com/dodsC/merged/h/msla_oer_merged_h" set region/x=100e:290e/y=20s:20n fill/l=1/lev=(-30,30,10) GRID_0001 !no problem fill/l=171/lev=(-30,30,10) GRID_0001 !fine !but cancel region fill/lev=(-30,30,10)/y=10n/l=1:171/x=100e:290e GRID_0001 ** unknown netCDF error code: -1 I am using FERRET v5.51 Tru64 V4.0E - 02/28/03 How is the above working in newer version? Has someone compiled v5.53 on a Dec/Alpha? Thanks, Dongxiao -------------------------------------------------------------------- Dr. Dongxiao Zhang NOAA/PMEL Bld#3 7600 Sand Point Way NE Seattle, WA 98115-0070 Phone : (206)526-4184 --------------------------------------------------------------------