I get this error upon trying to open Sonar Platinum
 
"This program can't start because mfc120u.dll is missing from your computer. Try reinstalling the program to fix this problem."
Windows 10 installed an update last night and Sonar had been running fine until I tried to open it this morning. I'm going to try and reinstall Sonar, but I hope this doesn't become a regular occurrence for Windows 10.
 
edit: there was also a few other DLLs missing.
 
edit 2: reinstalling fixed the problem. But I have a feeling this will become a regular problem with Windows 10 and this should be left here so the developers know about this.

I think you may be right Vern. Not being able to disable automatic updates is a huge concern.

Was missing Microsoft foundation class libraries within windows...
Cheers..

I'm having the same problem, I will reinstall Sonar tonight...

Doktor Avalanche
Was missing Microsoft foundation class libraries within windows...

why doesn't sonar detect this during install? or should that be another feature request?

pwalpwal

Doktor Avalanche
Was missing Microsoft foundation class libraries within windows...

why doesn't sonar detect this during install? or should that be another feature request?

Nope. If anything a MS feature request.

The scenario often happens after a Platinum install. I am guessing this happened after a win10 upgrade, or win 10 did an update, or another app was installed that changed the environment. At least it came up with an appropriate error message making it easy to diagnose.

Not just a Sonar issue happens with multiple apps and plugins. DLL hell is still with us.

One more reason to not upgrade.  Or at the very least to wait until June of 2016 when bugs will be maybe worked out.  Also realize if you are tracking and W10 decides to update, odds are you will be laying down the greatest track of your entire career, only to see it get all poppy-glitch-ruined.  Nothing on my machine updates unless I let it.

GregGraves
One more reason to not upgrade.  Or at the very least to wait until June of 2016 when bugs will be maybe worked out.  Also realize if you are tracking and W10 decides to update, odds are you will be laying down the greatest track of your entire career, only to see it get all poppy-glitch-ruined.  Nothing on my machine updates unless I let it.

MFC DLL errors happen all the time regardless of Windows version and application. It's the MFC libraries conflicting here (probably just need updating) not the OS itself, just a component missing. I wouldn't blame this specifically on Windows 10 or Sonar.
 
I agree there will be bugs in Windows 10 that will need to be ironed out, and waiting out for them to be fixed. This isn't an apt example though IMHO.
 
It would be nice to see one day in windows where a missing or out of date library is detected, an automatic option to download them. So far no dice.

I'm just installing windows 10 for the first time in an experimental partition. I notice windows 10 removes media center. I'm willing to place bets that this was the problem.

Check...
https://www.cakewalk.com/...ror-for-Missing-MF-dll

Haven't found any of this happening to my setup. I did have a 3rd party problem, in that I wasn't using the latest version and that caused an audio problem, but once I updated and re-authorized, I'm good now. I will say, that I haven't been running on this disk for very long. When I upgraded to Windows 10, I did so on a backup of my Windows 7 disk. When there was a problem, I went back to 7 for the weekend. I'm back on 10 tonight. I think it may be a good idea to run a Restore Point so I can get around any nasty upgrades if they displace any Dll's