Whoa!

You nailed it.
Many thanks , this has given me headaches for a week.

The culprit was a mod called "construction planner" .
It did exactly what it should - but I didn´t think about it anymore.
Must have added it only lately before I stopped playing the last time.

Alt+C to approve single ...

Hi,

it seems that my construction bots are not able to execute their duties.
I have provided 2 screenshots, indicating the situation along with a save game.

I have placed a ghost of a belt, next to a roboport and provided belts in a storgae chest, buffer chest and passiver provider chest.
The ...