OK, sounds like a particular corruption that you now need to isolate. How I would locate this is trial and error.

With a copy of the document, delete the back half of the document and see if the crash happens.

If the crash still happens then you know the problem exists in the remaining part of the file. So delete the back half of that remaining content and try again. If the crash DOESN'T happen then the corruption must be somewhere in the deleted content so undo the deletion and delete smaller parts in a systematic way, testing as you go.

Keep removing content until you reach a point where the crash doesn't occur. Make note of the part of the document which can be removed to avoid the crash occurring.

By progressively removing half of the document at a time you can fairly quickly arrive at a particular page or paragraph which causes the crash. You should then be able to CUT that content and PASTE AS TEXT ONLY to remove the hidden corruption. Do some more testing and if you are back in action, restyle that content and carry on.

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Andrew Lockton
Chrysalis Design, Melbourne Australia