Comment #1 on issue 598 by pekka.klarck: import problem in Testdoc and libdoc tools in robotframework-2.5
http://code.google.com/p/robotframework/issues/detail?id=598
Both libdoc.py and testdoc.py work for me with RF 2.5. Could it be that you have both 2.5 and 2.1.3 installed and these tools found the latter? What do you get when you run the following commands:
pybot --version python -c "import robot; print robot.__version__"
