There are already posts all over the forum about how inter-document cross references in InDesign are "fragile" and slow and can cause crashing, which I recently learned the hard way. We tried to live with the slowness and the breaking links, but the show-stopper was that we couldn't export our largest book without InDesign crashing. (The book contains 150+ individual documents.)
Based on some recommendations, we are now using a trial of DTP's Cross References PRO plug-in for InDesign. I removed all cross references that were created using InDesign's native cross references, and added several new ones using the plug-in. The slowness has gone away and the cross references don't seem to be breaking anymore, but InDesign still crashes when I try to export our book. DTP's support people insist that their plug-in should be able to handle large books, unlike InDesign. (And I've heard very good things about their support.) Is it possible that our files and/or book are corrupted from when we had the native InDesign cross references? Has anyone switched from native InDesign cross references to DTP cross references?