I accidently created a cutout shape in my pcb design. For some reason I can not select it to delete it. When I zoom into the design it disappears and when I zoom out it is visible. It also appears on all the gerber layers when created. Any advice to get rid of this will be greatly appreciated.
Selecting the outline of the cutout shape (in copper?) and then subsequently deleting it seems to work OK in V21. Have you tried re-saving the pcb design (as another file name) and see if this artefact disappears?