Netbeans Run project button disabled

Question

I have been working on a project, everything was going smoothly and project has no errors. Last saved project was ok and running smoothly but when I opened same project after 2 days the run project button is disabled, no options are available/enable to run my project.

in above picture rectangle area in red color where options are disabled. I dont know what should i do, I tried to copy same project and pasted in other location and opened from netbeans.. but still same problem.. How to run this project.. please any one help me out.. thanks

Answer 1

Disable "Compile on Save" and restart Netbeans.

Answer 2

This problem happened to me several times before, I used to restart Netbeans and it works every time.