Speaking of large vector files, how *do* I enable 64-bit support for macos x (or is it purely the lfs flag I need) during compile? --j -- Jonathan A. Greenberg, PhD NRC Research Associate NASA Ames Research Center MS 242-4 Moffett Field, CA 94035-1000 Office: 650-604-5896 Cell: 415-794-5043 AIM: jgrn307 MSN: jgrn307 at hotmail.com