Hi!
Difficult to help you without having a look at your model, but I'd suggest you try to replace the objects reported in the IFC export error dialog with simple doors e.g. from the default library.
If the export works without the error doors, then it'd be a matter of looking into each of the door families to find what is causing the export to fail and hopefully modify the families so that they work.
You should also make sure that your mapping of revit categories to IFC classes is OK (I'd never use the default settings and files...)
Hope some of this helps, but please do ask any questions you might have. I'll be happy to help 
Rene Pellicer Garcia
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