In other words, the end outer repeat is trying to go back to the inner repeat start (b. 140), and the initial start repeat is “unpaired”.
How can I fix this? Is there a way to set the end repeat’s ‘target’? Granted, I suppose that nested repeats are essentially ambiguous without some further clarification.
I think, that nested repeats should be avoided, because there are always amibiguous. Some people even think, that they are wrong, but I didn’t find any proof for this. Gould and Read don’t mention them.