I have experienced great problems exporting to pdf and to idml files from InDesign with certain files.
This started about a two weeks ago, InDesign wil crash and quit when trying to export files.
Please help as I have a project I need to export to IDML format for a user who only had CS4.
Which version of ID? If CS5, are you patched to 7.0.4?
Suitcase Fusion 3 installed? If so, try disabling the auto activation plugin.
This looks like an old post but just in case
If it only happens with certain files it could be a corrupt document. Depending on the size and complexity of the document, try creating the same size document and copy/paste all your content to it. Save it as a copy and then try to export from your new file. If the problem persists than that rules out a corrupt InDesign file as the culprit.
Such has been the case for a few files I've come across, usually ones that have changed hands a few times.