From the Kraken FAQ (thanks to Jeff for pointing this out to me):

Why am I getting "could not find *.so"? Or: can I use dynamic libraries? These files are dynamic libraries, which exist on an NFS file system, which is not visible to the compute nodes. Thus, when the dynamic linker goes to add the library, it can not find it. In the past, dynamic libraries were not supported on the compute nodes. Now, you may be able to use dynamic libraries if you have the files on Lustre, but it is recommended that you use static executables regardless. To check if an executable has dynamic linking, use ldd executable http://www.nics.tennessee.edu/faq -Matt