what's the reason of main script not called?

[sxkobe]

in the last stage of bubblerob tutorial,the first time i can run the simulation successful,but when i change some thing,why it tell me main script is not called?

[coppelia]

Hello,

what is the change you made before it didn't work anymore? You question is quite vague, please give us more details, or post your scene.

Cheers