Markus, the $CP needs to be set by you, where the toolsUI-2.2.14.jar is located. Here is a shell program. replace <yourpathtoo> with your own path. #/bin/csh -f set CP="<yourpathtoo>toolsUI-2.2.14.jar" echo "java -classpath $CP ucar.nc2.ui.ToolsUI" java -Xmx512m -classpath $CP ucar.nc2.ui.ToolsUI also the Grib2Netcdf can replace the ToolsUI by java -Xmx512m -classpath $CP ucar.nc2.iosp.grib.Grib2Netcdf INPUT OUTPUT.NC Don't forget to add the INPUT grib file and OUTPUT.NC names. robb... Ticket Details =================== Ticket ID: NXD-544090 Department: Support netCDF Decoders Priority: Normal Status: Open