I added a rectangle to connect ground plane with soldering strip (for soldering shielding box) and then it started saying that about every net is shorted with about every one. So I tried to remove the small one but the big was removed. Error messages ** Message: GotoError: ChangeGroupVisibility (GetLayerNumber ** Message: GotoError: ChangeGroupVisibility (GetLayerNumber ** Message: GotoError: ChangeGroupVisibility (GetLayerNumber were generated I don't know exactly when. Then I did undo to recover the big rectangle but got bad serial number 700 instead of 699 something like this.
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