Bob, For your problem, it should not matter whether you built with the --disable-largefiles option. It looks like you Makefile doesn't include the libnetcdf.a library after libnetcdf_c++.a. The C++ library calls functions in the C library, since it is implemented as a thin veneer on top of the C library. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: NIJ-477630 Department: Support netCDF Priority: Normal Status: Closed