API related question.

I am using xCad add in to read and write to third party storage in Solidworks files. I am having non consistent issues with writing or reading the entire XML. In order to verify what is happening I want to look at what was written to the part file using some kind of viewer.

Opening in a text file does not work. I tried opening with a viewer called binary viewer - no joy. Anybody have any ideas on how to see what was written to the Solidworks part file? Without verifying what was written I can't tell if my issue is reading or writing.