Hi Lara,

> I tried it with BoundingBoxCenter (before: bounding box center).
> No error this time - fine. But also not an operation - ces´t dommage.

It may be a little bit difficult to see the result - the command BoundingBoxCenter puts a point object at the center of the bounding box around the selected objects. So after you run it, a point object should appear, it will be a small marker at the center of the selected objects.

It sounds like you may be expecting something else to happen instead?

- Michael