Engerek01: Everytime I try to lunch the NWN2 Toolset, I am getting the same error as you can see in the attachment.

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System.NullReferenceException:

Location: OEIShared.IO.GFF.GFFFile.Open(Stream cStream)
Location: OEIShared.OI.GFF.GFFFile..ctor(Stream cStream)

NWN2Toolset.NWN2.Data.Blueprints.NWN2BlueprintSet
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So far I tried the followings according to my searches on internet.

1. I deleted everything in "Override" folders.
2. I started toolset as admin and/or with XP Compatibility.
3. Downloaded and installed DirectX 9c August 2009 version. (restarted computer)
4. Change my keyboard to English from Turkish. (made english default before running toolset.)

My specs:
Vista 32Bit
GeForce 9600M
Core2Duo P8400
3GB DDR2 RAM.

Tnx.
Engin.

Hickory: This error is clearly a language problem -- the toolset is unable to open a resource it needs. It is not enough for you to just change your keyboard, you need to change your regional and language settings to English and then reboot.

Engerek01: Hickory, you are a genius. It worked and I didnt even have to reboot. Thank you. I thought I had opened this topic as a question.