IcewinDale2 ChDataTypes.cpp error

[Nemesistr]

Anywhere Icewind Dale 2(main menu,at fight,while loading...) game crashes and an error appears:
An Assertion failed in ChDataTypes.cpp at line number 261
Programmer says Uncompression Error:-3
Then the game returns Windows
I install the patch 2.01 but it didn't help
What must I do? Please help

[RokChild]

I had this problem and the onlt way I could fix it was to remove and reinstall.... it may be that you have an error on your HD... try to de frag before reinstalling ID2..