Just in case there is a problem with the file, create a new project and import the one you have been working on into the new project.
You can also wipe out your preferences, just in case. Hold down the Alt key while you launch Premiere Pro. Keep holding it down until you see the Welcome Screen.
no its no problem with any files but it started with a lot of files...when i open an older project, everything works...
I don't understand.
no its no problem with any files
What does that mean? If there is no problem, what's the problem?
In any case, if it happens to lots of projects then it is even more likely to be a preferences problem.
sorrry that was stupid, no file is broken, it only started in premiere...thats what i mean, every file works without any errors out of premiere..