you can take any text editor and replace " with ""_" 


"<book id="""_"bk105"""_"><author type="""_"old"""_">Corets, Eva</author><title>The Sundered Grail</title><genre>Fantasy</genre></book>"

After a research , I have found the issue

<assign value='source.Message.ReportType.contentproperty='target.Document.Description' action='set' />

content is missing in my DTL previously.

Hi Robert,

Can't thank enough .. That's just spot on...!

Thank you so much for the detailed explanation, knowledge on these basic things are very much an asset for a newcomer like me.

Thanks again.

Thanks Robert,

I  extended my Namespace with %sys. Due to this I faced all the above issues. As per your suggestion, I have created new namespace extending HSSYS. Now all issues got resolved.

Thank you so much for your help.