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No, i was saying that the problem only exists when a diagnostic view is programmed in your project.
A solution is to run the installer from tia v17 again selecting "repair". From then on you can open all projects including those with a diagnostic view. ( worked for me and my colleagues)...
My german is not good enough to respond, but i will respond in english:
-Problem only exists when diagnosic view is used in the screen. When deleted the problem is solved.
-When you run the installer again en select "repair" the problem is fixed.
Kind regards