Hi,
i have reencountered the same problem with a view file not opening in a sheet again. I think it has occured to me already in 4 projects, and the problem somehow always disappeared...accidentally..
It happens with only one view. I have tried inserting it in different sheets, but it doesn´t work anywhere. I drag and drop it and nothing happens: no error message, nothing. I can insert the view as an xref, but then it is inserted as a block and not a viewport.
Other views get inserted regularly on any sheet.
I have tried copying the view, relaunching autocad, checking the xml file, nothing helped.
Other views containing the same or similar constructs also get inserted regularly..
All my view names are different, I don´t repeat any file name in the project.
thank you for any advice