to w6kd!! THANKS!!! I realize this is many years old, but this fixed my problem!!! I can now fly my Flight1 ATR without CTDs!! I'm using FSX Steam! All settings maximum. I never load the default plane, I just jump right in. Disabling those three PMDG modules in the dll.xml file fixed my problem. Thanks!!! I hope to share this with anyone else trying to run the old F1 ATR. It was/is a great plane!!