Dear Connie and all, Indeed I was stupid. I installed the Intel compilers, but the PATH was pointing primarily to the ia32 version of the compiler. Now I uninstalled everything and install the EM64T version alone, and it seems everything works. I shall have a happy Christmas without having to reinstall the OS. 8) Regrads, Kuo Kan LIANG Division of Mechanics, Research Center for Applied Sciences, Academia Sinica, Taiwan >Kuo Kan, > >Have you asked Intel about the issues you had with their compilers? > >-Connie Sieh > >On Wed, 7 Dec 2005, Kuo Kan Liang wrote: > > > >>Thank Troy and Connie for the `positive' 'negative' answers toward other >>solutions instead of reinstallation. >>I will do that. Actually before asking those questions, I have already >>educated myself that I will do this before Christmas. >> >>One thing that makes me really sorry for doing this is that there had >>been many people in this mailing list >>encourging me to use x86_64 Linux instead of i386 Linux. >> >> >>