There are differences in the way NPrinting 16.6 and NPrinting 19 handles embeded content in email body. Objects which you had previously created as an excel template now have to be re-written to html.
During migration I am sure there were highlighted as not supported object or those which were not migrated.
Those kind of differences need to be considered before migration and there is additional development required to make sure they are properly working in NPrinting 19
You may want to look at how to embed reports in email body and how you can disable file attachements here.
note this bit in help :
Leave the Attach to email check box selected if you also want to send this report as an email attachment. You may want to disable this if you are embedding a large report directly into the email body.
cheers Lech, When applicable please mark the correct/appropriate replies as "solution" (you can mark up to 3 "solutions". Please LIKE threads if the provided solution is helpful to the problem.