If you have problems, and you're not working in China, there is no obligation on Siemens' part to help you.
It will only work in NX9 if you have a license for the Greater China Toolkit. Without that license you get an error.
I was using Gear modelling (china version) very nicely in NX7.5, but now we have gone to NX10 it is not available at all. Is there any other solution for creating gear models in NX?
I will be very dissappointed if the answer is no, as other CAD packages offer it.
And the answer is - NO (if you are outside China)
I too have no idea why this is so, but that's the way it is.
(yes, it boggle my mind too why NX doesn't have this capability "built in" - they even used to have a KF based "Gear wizard" module you could buy, but that is no longer offered for sale)
You could try the gears in the mechantronics library (%UGII_BASE_DIR%\MECHATRONICS\mcd_reuse_parts\...\
You could try KISSSOFT (A Siemens partner)
You can do your own.
Production: NX10.0.3.5 MP5 + patch/TC11.2
I'd rather be steemed than diseaseled