To rule out a duplicate AFCAD issue, use simple airport scanner (you'll have to Google it since I can't post links) to scan your FSX install to see if there is a duplicate AFCAD installed for EHAM. If you use the scenery config editor, make sure EHAM is activated when doing the scan.

Okay, it appears only certain selections cause the error. AESLite ramp vehicles, street vehicles, Mist FX, and Safegate Type3. The others work and allow me to make the selection.

Thanks...

**edit, nevermind. I can make selections but when re-opening the configurator, the check entries are gone.

I just purchased Montreal and saw the thread regarding the fix for the config tool. I installed the file but unfortunately, I'm still receiving the "unhandled exception" error when attempting to activate/deactivate features at Montreal. Any suggestions? Thanks.