Q2ID is designed to convert QuarkXPress documents into InDesign. If Q2ID does not understand data in a QuarkXPress file, it still attempts to convert the file the best it can, but may skip the unknown data. When a QuarkXPress file has been created using a special XTension, many times these XTensions write custom data into the file which Q2ID skips.
In some instances this custom data may cause Q2ID to crash. If this is the case, you can always send us the file to review ( MWTS ). We may be able to figure out how to skip the data that your XTension has written into the QuarkXPress file. When data has been skipped this usually causes issues with the converted file.
When a third party XTension has been used to create a QuarkXPress file and the file is converted using Q2ID, typically you will see missing items in the converted file.