Missing elements in 2d

why may this happen all elements suddenly disappear from 2d but i find them in 3d

and when i select the whole viw with box i found all elements in the filter ??

and view range and v/v and worksets all is ok

why this happen suddenly ??? and eveything was ok when i was working on view and when i turned to another view after minute this happen to each view ??

can anyone help please ???

and i notice that happen after deleting another view i working on editing it

can someone help ?

Visible in view could mean that there’s no visible geometry. It could also be a scale issue if you’re zoomed out really far. There are many reasons as to why this could happen.

However, this is really a question for one of the Revit Forums and not the Dynamo Forum.