Undefined symbol when trying to load a C++ UDAF

Hi folks, I'm attempting to deploy an analytic function written in C++, and I'm getting the following exception: [/scratch_a/release/vbuild/vertica/UDxFence/vertica-udx-C++.cpp:132], error code: 0, message: Error happened in dlopen(): [/tmp/libAnomalies.so: undefined symbol: vt_throw_exception] I compiled the library against the headers found on that installation, so I'm very confused as to what could be causing this. The platform is CentOS 5.4/Vertica 6.1.1 Enterprise. Thanks! Josiah