Thank you very much for the tips. Now I proceeded radically, uninstalled everything and deleted all the folders that I found in connection with NV3. I reinstalled everything. But new problems have arisen. Suddenly there is a total crash, so that the PC even turns off. The second point, when starting a task, the task locomotive is not on the track. only when it is loaded a second time is it against Da. I will give the PC to my shop to see if it is on the PC. Unfortunately, this can still take a while, because in Switzerland, the stores are still closed due to Cov 19 fours. But it seems to me that the TRS 19 has not worked properly since the first update. Thank you for your help Peter