Hi @ChristianSch , could you please download the free utility program Process Explorer from here? It’s similar like TaskManager, just more reliable and powerfull than that. Have a look for the Dorico process as well as the VST Audio Engine process, when it appears to be frozen in, do a right click on the Dorico.exe, resp. VSTAudioEngine.exe and from the pop-up menu choose Create dump > Create Mini Dump. The resulting files please zip up and post here or send to u dot stoermer at steinberg dot de. Thank you very much