I think you check through your code and make sure to set
Babenberg = NULL; AFTER you have set Austria = Habsburgs;...

Other than that, itsa a tricky one. E_Fail seems to be a GENERIC failure code.
I would be inclined to::
1: Disable any shaders and try again. (maybe a video-memory issue)
2: Be aware of you particle count. (remember to increase max_particles)
3: Watch for memory allocations. Dont try to allocate too much per frame.


Best of luck!