Hi KenHow do you "revert" back to before? I thought REX changes ALL your FSX files. And if the performance hit is only with PMDG then what? I'll try the mesh add-on first...see how it goes.decisions, decisions ,decisions.

It replaces existing texture files with higher resolution textures, but it also backs up your current textures to a user-defined location. That way you still have the originals & can copy them back into fsx if you want. I've never had to restore a backup so I dunno if it's automated through Rex or if you'd have to do it manually

exactly the same problem I disabled REX. Did 1 flight OK, then it froze again,but this error did not come up since REX was not active.. Hopefully a fix is coming..

Adan, Your rig is quite dated now. Todays addons (like the NGX) just push rigs to their limit but you still need CPU grunt. I don't think a fix from PMDG is going to change this.

Thanks guys

Don't know if this helps, but here is a post from Ryan of PMDG regarding .NET CTD's: "The NGX **does not use .NET or smartassembly**. Period. It is literally impossible for the NGX to crash due to either of those things - it's some other app causing the crash. The NGX is pure C++ and a bit of XML, neither of which have anything to do with .NET or smartassembly. Your error logs specifically mention REX, which is a .NET/smartassembly app and is known to cause error windows like that.Please stop blaming the NGX for things it's not responsible for. Do some research about how these error message work. A C++ app cannot give you .NET errors." Ryan Maziarz