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Anne, Here's something that has been reported to work with xlf and -qextname: configure --prefix=/myhomedir F77=xlf_r FC=xlf90_r FCFLAGS='qsuffix=f=f90 -qextname' FFLAGS=-qextname CPPFLAGS='-DIBMR2Fortran -Dextname' LIBS=-lSystemStubs I'm not sure how much of this is necessary in your case, but it looks like explicitly specifying -qextname for FCFLAGS, FFLAGS, and CPPFLAGS is advisable and using -DIBMR2Fortran rather than -DpgiFortran for CPPFLAGS may work. If you get a combination that works for you, please let us know. If you can't get it working, please send all the information requested here so we can try to duplicate the problem and find a solution: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-install.html#Reporting-Problems Thanks! --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: CXW-877910 Department: Support netCDF Priority: High Status: Closed