>This means I should be able to start another thread, have it change >>directories to a place where there is a .httprc file specific to the user >>the task should run as, and then call netcdf. Almost. The rc file is read once at the first call to nc_open so in effect it is read once per process. However, this gives me an idea. I add code to cause a specified rc file to be read so that you can force re-initialization at any point using any rc file without having to change the directory. I will try to add this functionality and get back to you. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: KMS-124565 Department: Support netCDF Priority: Critical Status: Closed