Error Message from Rhino

i am doing a refresh of a beginners course in which i have to move something and then suddenly a error message pops up

what can i do for it?

and another one

i even tried reinstalling the whole thing…

That message is totally normal. It means you moved a child object that had history attached and that breaks its history relation with the ‘parent’ object. You can turn off these messages if you right click on the Record History box in the status bar and uncheck “History Break Warning”,

ok, first of all thank you for the fast answer. i am trying to move the orange/selected part to align the
lower left part. it should move both parts at the same time but it seems there is no connection between the two parts so the lower doesnt move together…i am such a newbie, sorry :open_mouth: