Russ -- thanks for the response. I was able to get it to work. The problem was with off_t define in ncconfig.h colliding with the sam on types.h. When I ran the test all tests completed successfully except one as below. Any suggestions? Mahesh ------------------------------------- *** Testing nc_inq_attlen ... ok *** Testing nc_inq_atttype ... ok *** Testing nc_create ... FAILURE at line 57 of test_write.c: attempt to overwrite file: status =7 ### 1 FAILURES TESTING nc_create! ### *** Testing nc_redef ... 1386 good comparisons. 34 good comparisons. ok ---- /**********************************************************************/ /* Mahesh Rajan EMAIL: address@hidden */ /* Senior Technical Consultant Caltech Ph: 626-395-2399 */ /* HP Voice Mail: 714-758-5322 JPL PHONE: 818-354-0381 */ /* Hewlett-Packard PAGER: 1-888-858-7243 */ /* PIN : 120066 */ /* FAX : 626-584-5917 */ /**********************************************************************/