Dorico unable to start: VST scanner crashing

I am having this same problem. I am a new Dorico Pro 5 user. I am running on a Mac. Diagnostic file attached. Any assistance would be greatly appreciated.
Dorico Diagnostics.zip (125.5 KB)

Welcome to the forum, @dave3. I’ve moved your post to a new thread. We’ll need @Ulf to weigh in here, I think, but it looks as if the problem on your system is that the VST scanner, which is part of the audio engine, is crashing when scanning the plug-ins on your system.

Go to /Library/Audio/Plug-ins/ in the Finder: this is the system Library folder in the root of your hard disk, not the one in your user folder. Temporarily rename the VST folder to something else and start Dorico. Does it run?

If it does run, then we know that one or more of the plug-ins in the VST folder is causing the problem. Try putting half of the files back and run again. If Dorico still runs, remove those plug-ins again, and put back the other half. You will soon find which plug-in or plug-ins are causing the problem.

If it still doesn’t run even with the whole VST folder removed, try the same procedure with the VST3 folder.

Welcome also from me, @dave3 .
Daniel already described it already pretty good, but you don’t need to rename the VST folder but only the VST3 folder, since the vstscannermaster only becomes active during VST3 plug-in scanning. Other than that Daniel’s description is perfect.

I managed to get it running by following your process. Interesting thing, as I added back the VST’s in groups of five or six, I eventually added them all back and it works. I do get this error even though these items are installed:

Hi @dave3 ,
if you put back all plug-ins and now it works, that would mean that the first initial scanning just took so long time and that you broke off before it could finish. Odd though, that HALion Sonic and Groove Agent can not be found now. That is strange.
Could you please create a new diagnostic report and post here? Thanks

Dorico Diagnostics.zip (816.3 KB)
Here you go!

I was having this problem, which I attributed to wake lock - and this may only be my problem: in the morning, after the Mac comes out of REM sleep, the VST scanner is hung, which then hangs Dorico (which I have left running). Forcing quit on the VST scanner (via Activity Monitor) doesn’t solve the problem, I have to force quit Dorico too. This only happens on the overnight sleep cycle, the three-hour nap my monitors take does not cause this. I find that I have to quit out of Dorico if I’m going to be away for awhile, such as overnight. A clean relaunch in the morning - along with a cup of Sumatra single origin - prevents this from happening.

Hi @dave3 ,
even more strange, now no plug-ins at all get recognized.

Could you please go to the Dorico Preferences, choose the VST Plug-ins tab, there scroll all the way down and click the Clear Audio Engine Cache button. Then restart Dorico and see what happens. Click always on Continue to wait when prompted. If after 5 minutes still the prompt appears, then I would like to have a remote screen sharing session with you, if you don’t mind.

Hi @phase_Shift , your hint looks interesting, thanks

Looks like I am good to go. I found a bad link in my VST3 folder that was causing the problem. I repaired that and everything is working fine now. Thank you for your help.

I’m glad to hear that.
And you are more than welcome