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Hi Christina, You have a mismatch in your version numbers below (4.0 and 4.2). Both 4.0 and 4.2 have the FileWriter class. Are you calling the same version of the jar that you have. If you have that correct, double check that you are running the command below from the directory where the jar file is located. Hope that helps, Ethan Christina Kalb wrote: > Hi: > I am trying to convert a nexrad level II file to netCDF using toolsUI-4.2.jar > and the following command: > java -classpath toolsUI-4.0.jar ucar.nc2.FileWriter -in KHGX19980421_072945 > -out KHGX19980421_072945.nc > > However, I keep getting the list of errors: > xception in thread "main" java.lang.NoClassDefFoundError: ucar/nc2/FileWriter > Caused by: java.lang.ClassNotFoundException: ucar.nc2.FileWriter > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:247) > Could not find the main class: ucar.nc2.FileWriter. Program will exit > > Is there a way to fix this? Ticket Details =================== Ticket ID: PZX-953741 Department: Support netCDF Java Priority: Normal Status: Closed