Ok, the problem is that Mystic don't remove/delete completely python2 field whe I leave it blank then python2 is not "deactivated" so when i call a pyhton3 script mystic give me the execution exception error as a reported on Mystic wiki using both version of python.
To tempoaly solve this issue i can give a wrong python2 lib path (like "." or something like that) although a warning appear (Cannot initialize Python, press a key) before execute pyhton3 script; but this way at least python3 works.
Please, I waiting for your feedback.
Thanks a lot.

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 La violenza Š l'ultimo rifugio degli incapaci!

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