OK, I don’t know how I’ve managed it, but I’ve nested one symbol inside another (I know this is not allowed).
I’ll try to explain how it happened, to the best of my recollection:
- I double-clicked on a symbol in a mock-up, selected a control I wanted to copy and hit Ctrl+C
- I double-clicked outside the symbol to go back to the mock-up
- I double-clicked on a different symbol, then hit ‘Edit’ to edit it
- I hit Ctrl+V to copy the control in the clipboard. Instead, the whole symbol was pasted.
Now I can’t delete the nested symbol, and the one containing it is ruined:
The contents of the nested symbol somehow got deleted, so now it’s empty and I can’t make it go away (I select it and hit ‘Del’, but nothing happens). The nested symbol itself is still in the library, and other instances of it seem to be fine.