Hi Nathan, I guess you are right. Both the files are built with i386 : ./lib/python2.7/lib-dynload/pyexpat_failed.so: Mach-O bundle i386 ./bin/python2.7: Mach-O executable i386 I am using the install_script.sh. Can I make it build 64bit ? I am able to import pyexpat. Shankar ________________________________ From: yt-users-bounces@lists.spacepope.org [yt-users-bounces@lists.spacepope.org] on behalf of Nathan Goldbaum [goldbaum@ucolick.org] Sent: Thursday, July 05, 2012 2:09 PM To: Discussion of the yt analysis package Subject: Re: [yt-users] yt installaton failing Hi Agarwal, I still think this is a 32/64 bit problem. in the $YT_DEST directory, can you do the following commands: (yt-i386)humperdinck:yt-i386 goldbaum$ file ./lib/python2.7/lib-dynload/pyexpat.so (yt-i386)humperdinck:yt-i386 goldbaum$ file bin/python2.7 The output for both of my files is: Mach-O 64-bit bundle x86_64 I have a feeling that one of your files is built with i386 (32 bit). Also, in the previous e-mail I wanted you to try importing pyexpat. In the python build by the yt script, please enter 'import pyexpat'. pyexpat is the built-in python xml parser. If python can't import it then your python installation is corrupted somehow. Cheers, Nathan Goldbaum Graduate Student Astronomy & Astrophysics, UCSC goldbaum@ucolick.org<mailto:goldbaum@ucolick.org> http://www.ucolick.org/~goldbaum On Jul 5, 2012, at 10:46 AM, Agarwal, Shankar wrote: Hi, While trying to install yt on mac, it quits after a while: Installing BZLIB Installing ZLIB Installing PNG Installing FreeType2 Installing HDF5 Installing SQLite3 Installing Python. This may take a while, but don't worry. YT loves you. Installing Mercurial. Installing mercurial-2.0 (arguments: 'mercurial-2.0') Setting YT_DIR=/Users/hitu/Documents/yt/yt-i386/src/yt-hg/ Installing distribute Installing pip Failure. Check /Users/hitu/Documents/yt/yt-i386/yt_install.log. I checked yt_install.log : from pyexpat import * ImportError: No module named pyexpat Something went wrong during the installation. See the error message above. install_script.sh: line 499: /Users/hitu/Documents/yt/yt-i386/bin/easy_install-2.7: No such file or directory Please let me know how to proceed. Thanks Shankar !DSPAM:10175,4ff5d2ea26207861929410! _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org<mailto:yt-users@lists.spacepope.org> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org !DSPAM:10175,4ff5d2ea26207861929410!