Sudden Crash

I added a significant amount of text to one of my project files. This included many url’s that were cut and pasted from my browser (references for public domain material to be included in the document).

Everything was find when suddenly Scrivener crashed. Subsequent attempts to open the file resulted in the file opening followed immediately by another crash. I could not correct anything (no sign of what needed correcting) nor could I compile the file into another format to look at it.

Any ideas? Thanks!