There are two problems here. 1. that variable does not appear to exist in that data set (look at .dds instead of .ascii). 2. The server opendap code has a missing edge case for an empty Dataset{}; it treats it as a request for the whole dataset. You will have to address #1. I will take care of #2. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: ZTH-269982 Department: Support netCDF Java Priority: Normal Status: Closed