In some cases mapStylesToXMLTags() method raises an exception!

HI,

I am trying to map styles to xml tags, and interestingly it works on some InDesign document while in some cases it dosen't work. It raises an exception IDS exception: 1.0, thats why I am not be able to understand what is the root couse behind that exception. So please if you have any idea, please let me know that.

Thanks in advance,

Suman Saurav