This is a summary of the problem reported by John Sheldon <address@hidden> in building netcdf-2.4.3 on CRAY T90. System type: > % uname -a > sn7203 t90 9.1.0.1 gfd.8 CRAY TS netcdf-2.4.2 is installed and builds correctly. Configure chooses 'c89' as the compiler and defaults to '-O' optimization, as in 2.4.2. The system uses xdrffio.c as it should. No problems with the build. The 'make test' fails: > making `test' in directory netcdf/netcdf-2.4.3/src/xdr > c89 -c -O -I/usr/include/rpc -DDEBUG xdrtest.c > c89 -o xdrtest -O xdrtest.o > ./xdrtest > xdrtest_out.new > diff xdrtest_out.new testout.sav > *** XDR passes formatted test *** > cmp test.xdr test_xdr.sav > *** XDR passes binary test *** > > making `test' in directory netcdf/netcdf-2.4.3/src/libsrc > c89 -c -O -DDEBUG cdftest.c > c89 -o cdftest -O cdftest.o libnetcdf.a > FORCE: No action was taken. > library: No action was taken. > ./cdftest > cdftest_out.new > diff cdftest_out.new testout.sav > *** netCDF passes formatted test *** > cmp test.nc test_cdf.sav > *** netCDF passes binary test *** > > making `test' in directory pub/netcdf/netcdf-2.4.3/src/nctest > ./nctest > *** Testing nccreate ... Unable to open file: testfile.nc > Error Explanation:Make: "./nctest" terminated due to signal 11 (core dumped) > cmd-2436 make: Stop Sometimes there is a similar problem in libsrc running 'cdftest'. Substituting the xdrffio.c module from netcdf-2.4.2 makes the problem go away. -glenn