We need dxdiag and files from this folder for solve your problem. C:\Users\<Name>\AppData\Local\Arma 3 Alpha\

Can you upload somewhere in winrar package please?
When package will be smaller than 5,000k, so you can attach here. Thank you.

http://feedback.arma3.com/how-to-user.html.html

Thanks. Uploaded DXDiag, but it seems the contents of Local/arma3 data is too large. The file arma3.mdmp is the biggest file. If I remove that it is small enough.

Ok I see now, you just need the .rpt file :). Uploading now.

I've changed to development build and this seems to be no longer an issue. Thanks :)

Fixed in dev.