Frequently Asked Questions

  1. Why am I seeing weird “symbol not found” errors while trying to import mdtraj?

    Let me guess – you’re using a Linux cluster running CentOS 5? Your system compiler is gcc 4.1?

    You need a more recent version of gcc (>= 4.4). You can set the CC and CXX environment variables to point to a different compiler.

    Unfortunately, installing from conda will not help you here. You must compile from source on CentOS 5 (or similar).

    For Pande lab members on vsp-compute, set the following environment variables and compile from source

    $ export CC=gcc44
    $ export CXX=g++44
    $ python install