Can't backannotate this operation. WTF !

[JacquesBBB]

I found various topics on this on the Web, but  none that really solved my problem.

The issue has been reported several time :

When you create a via in Eagle, you cannot get rid of it in a simple manner.
Eagle will provide you this stupid message :

"Can't backannotate this operation. Please do this in the schematics !"

But there is nothing related in the schematics. Looking in various posts on the web, you learn that you
need to use the ripup tool. But it does not work !

Ripup removes the via (with half of the work you already did), but leaves the hole in the "20 (dimension)" Layer.

I found no way to remove this hole. Please  HELP !

[Monkeh]

You've managed to do something very odd.

Ripup removes vias. There is no hole in the dimension layer for a normal via.

[fivefish]

Ripup the via, then click the Ratsnest icon to redraw the page (and remove the X mark where the via used to be).

[JacquesBBB]

Thanks to both,  this was helpful as it showed me that  normally it was supposed to work.

In fact, the solution was something else. I needed to do the DRC again. This is what cleared the trace of
the errors on the dimension layer.