strange problem when editing the .SCN file

[ceSniper]

Hi,
I am working on updating my "Town of Aretua" track and just updated my BTB to the latest version (0.8.9.0) and tested if it works and it does export it all right, and as usual after exporting it and checking it works, I modify the .scn and .gdb file to change light, clip planes etc.
The problem I´m getting now is whenever I modify a parameter in the scn/gdb (even just cliplanes from the original 1500 to another value), it crashes at the end of loading

I tried deleting the HAT file, but same result

Does anyone know what may be going on?

thanks in advance

 

[Kennett Ylitalo]

Win7?

 

[ceSniper]

yes, windows 7 ultimate.

It let me edit the scn files in other tracks, but for whatever the reason, not this one