Rich- The problem, as you will have seen, is that Hyrax is actually returning the string "nan." instead of "nan". I put a hack into the client side code to convert the string "nan." to "nan". The correct solution is to fix the Hyrax code. This fix should be in the 4.2 alpha and later code. =Dennis Heimbigner =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: QOJ-218275 Department: Support netCDF Java Priority: Critical Status: Open