When I removed the prepopulated Post IDs, the import worked.
Of my 12723 entries, 12076 were imported. The remaining ones reported bad addresses. However, it did not report which ones failed to load. I am thinking that if I exported my entries I would be able to compare which ones were not imported by showing which ones did import. Does that make sense?
Is there an audit service available to help me properly setup my GD-directory for my site?