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Export half the amount of pages.
Then try the other half.
Whichever half fails is where the problem is.
Keep halving your page exports until you narrow down where the issue is.
It's likely an image or something that needs to be resaved and relinked - just need to find the page.
Did you preflight the job to see if there are any conflicts before running the pdf? Run package and look to see if anything shows up in that area too.
Just a few more questions to try to pinpoint the error. It could be on one page. Does this happen on every InDesign document you try to export or only this one? Is your preflight panel light green or red? Does the document have hyperlinks? Do you have an image file open in another application? Is your PDF preset one you've always used with success?