What I infer from your last comment is that matlab supports direct calls into the HDF5 library, is that correct? =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: ZEO-928138 Department: Support netCDF Priority: Normal 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.