Cannot debug Windows Phone app after install Visual Studio 2014 CTP

Question

I've have a strange error with Windows Phone Emulator. Last time I used Visual Studio 2013 and everything worked fine.

Recently I try Visual Studio 2014 CTP parallel with VS2013 but now I cannot debug Windows Phone app with Emulator from VS2013.

The app deploy successful and I can run it from Emulator but when I hit F5 VS always show:

"The application could not be launched for debugging. Ensure that the target device screen is unlocked and that the application is installed."

I've removed all Visual Studio 2014 CTP and Emulator 14 but it's not effect.

Could anyone here have similar error? Please show me what problems is?

Thanks in advance.

I still debugging with WP7 Emulator by ordering: Deploy app then Debug but WP8 Emulator not work for debugging anymore — tungnt185
I had a similar issue stackoverflow.com/questions/31432007/… which started when I updated the app. If it is only the debug issue then for me it was enough to create a new solution and import the old project. At least if it is the same error :) — JTIM

RashmiA-MSFT RashmiA-MSFT · Accepted Answer · 2014-10-24T17:23:55

The only time I have seen this error was when the app is already installed on device\Emulator, I had to remove the app , then hit F5 to work.