simple animation get stuck at start in mecanim [5.2.1p2 and earlier] - Solved

It seems that I can’t create any new working animation in Unity.
When in play mode. The animation plays first frame and then stops by itself.
See the attached image below. The blue progress bar is really stuck at this point in play mode!

the scene is just more than basic.
1-create a new scene
2-create a cube
3-create simple animation for the cube (automatically create animator with animatorController)
4-press play

I can’t say when it happens because i didn’t had to create animation in my project in the last weeks.
I tried all the recent Unity versions, none resolves my problem.
Neither calling animation from script…

The only thing that works is creating a new project. Then mecanim works properly.

Do you know any solution to fix a broken mecanim?
I’d prefer to not move my entire now big project to new project :confused:

Ok i’ve finaly been trying to move my project into a new one.

The problem still occurs when i copy the projectSettings folder into the new project…
Which are the asset files linked to the mecanim? I have so many settings to save from my project…

I’ve been able to isolate the problem. It cames from the timeManager.asset

Looking at the time manager tab into my source project, time scale for no reason was set at 0…
Problem solves putting it back to 1! =)

I have no idea what happened…
Sorry for the bother.