Hi 
i have been working on a model with about 13 subtools.
when i try to load it Zbrush 3.5 R1! says:
INTERNAL ERROR.\Mash3DDXF.cpp Line: 12976
Error while reading HighDef data
half of the subtools are zspheres+zsketches
or tools with less than 2 million polys
(unified skin)
tool polycount was under 20 000 000
running on windows xp
dual 2,3 // 3 gb ram
my i upgrade to R2 in order to solve the problem?!
yes, you should upgrade to R2.
i am addicted to zbrush please help 
well my rule of thumb is always to upgrade to a new version if one is out. If you were not sent one, then you need to contact the tech support service. Upgrade to 3.5R2. I bet this will fix your issue.
hi
ok, i got it.
support is awsome thanks!
hi
but the problem with the tool remains in 3.5R2…
any idea on how to load this tool?