Nishu is correct, if you can identify the point in the sequence where the problem is caused, you can take measures to replace the footage or component that is causing the issue.
If this happens to me, I break the timeline down into sections, and just export one section at a time, until I have found the part of the sequence where the export is failing. I keep narrowing down until I have found the problem section, and replace the footage, or create a new clip with the existing file etc.
One common problem I find when exporting is images. If they are particularly large in resolution, they often cause exporting issues, and I recommend making the image smaller in photoshop and re-importing.
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