Monobehaviour not working properly

Suddenly Update function in all the scripts in my specifi project called only once . it seems for me that monodevelope getting crashed at somepoint . But if i create a standalone or export as a package everything works fine in device . This happening only in editor .

Examaple: I create new c# script with default name. then i add one line of code inside Update function “print(“each frame”);” . I can see it printed only once in console . I know about collapse feature its only printed once .

Can you guys tell me what can be the problem or how to fix it .

Things i already tried .

1.Uninstalled and reinstalled unity3d 5.5.0
2.Uninstalled ver 5.5.0 and installed 5.6.2

still issue remains .

I tried to create new project and just put “print(“each frame”);” in Update function it worked fine .

So the issue about the particular project .

Thanks guys for a reply . I found the issue .its very simple and apology for wasting your time .