Just a suggestion. I upgraded from Tes4J3.2.1 to Tess4J 3.4.2 last night. Was getting vague error from JNI about not being able to load a module. After hours of googling and trying various possible solutions, it turns out that 3.2.1 worked fine with the 2010 VC++ DLL, but 3.4.2 does not. Might be useful to add that to the readme.