Hi again,
I tried several flights without any problems. Then I went back to the airport, I had the CTDs for two times in a row. And again Pushback Express made a CDT at the gate, after a few minutes.
The airport is the marketplace payware airport CYVR (Vancouver).
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EDIT: Well, just forget it. Did some further tests. The sim crashes in that area anyway. With or without PE. So thanks for you help. It seems there’s a MSFS problem with that area.