Thank you for bringing this up. Currently, inside a CDL file, the keywords are reserved, but it is possible to create a file thru the API that has e.g. a variable named 'data'. This is inconsistent. I will create a bug report for this on github. In the meantime, you will have to rename the variable. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: BNL-694121 Department: Support netCDF Priority: Normal Status: Closed