Hi David, In createNewFromTemplate(), you have: NetcdfFileWriter rc = writer.getNetcdfFileWriter(); rc.create(); return rc; Try this instead: writer.write(); return writer.getNetcdfFileWriter(); That should do the trick. Cheers, Christian Ticket Details =================== Ticket ID: ETP-997396 Department: Support netCDF Java Priority: High Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.