Runtime error [SOLVED]

This morning I was working on a large ongoing Sonar project. I broke off to do a few installations, etc., i.e.:

• Installed Melodyne Essential
• Installed and authorized some IK Multimedia softsynths & fx
• Authorized my UAD plugins

After that, the project would no longer open. It would display 2 or 3 instances of a "Runtime error" dialog box before crashing. At first I assumed that the project was corrupted, but I tried opening several older backup copies of the same project and the result was the same. I took a copy of the project to my old computer and it worked fine there. So the issue is apparently with the current setup. I tried reinstalling Sonar Platinum, but that did not change anything. I tried opening other projects. Most of still open and run ok but a few don't.

I'm running out of ideas.

Melodyne uses Visual C++ runtime library. That's where I always start.
 

pwalpwal
have you tried "reset and rescan" plugins?
did you reboot before/after the installations?

 
Yes and yes.

and what does windows event log show? (especially as it's a vc redist error, there should be something)

Kev999

chuckebaby
Melodyne uses Visual C++ runtime library. That's where I always start.

 
Should I reinstall it? The 2015 version?

The latest version from MS. Go right to their site.

I would uninstall the things you installed one at a time as that seems to have caused this.

The virus scan didn't reveal anything.
 
I've uninstalled all the IK Multimedia stuff (including Authorization Manager). I've uninstalled Melodyne. Also re-installed Sonar. Re-booted after each stage. Still the runtime error messages persist.

I'd never ever done a system restore before, but it seemed like a good idea in this case. I restored the o/s to the point before yesterday's Melodyne installation. Now everything appears to working fine. SUCCESS!
 
Not quite everything though. There has been another intermittent problem all along that I haven't mentioned yet, but I'll start another thread for that.