Megado - When you push the shed treadle, there is no shed.

Possible reasons:
1. The cable of the treadle has become undone.

2. Computerdobby: To prevent overheating of the interface, it becomes inactive if you wait a while before making next shed. Activate the interface again with your software.

3. Mechganical dobby: There are no pegs in the program bar that you just put into position.