Ok, i dont know if anyone else is suffering this annoying error, i made a serch and culdnt find any post related to it.
My problem is very time i hit the TPOSE MESH button, when zbrush starts going subtool by sub tool it suddenly stops and this error message appears:
After that nothing happens and the tpose mesh is never created, then i cant use transpose master again, unless i restart zbrush and the error keeps hapening every time i use it, some times it works, and ive not find a reason of why it works with some tools and not with others. please help, this is extremely annoying 
This error happened too in version 4 r4.
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