Could you describe in detail what you are trying to do? Trying to open existing report or create new report template with Excel format. What is the expected result? Should be able to open template editor What is the actual result? Template editor does not open and the following error message is generated:
Environment
NPrinting 19 and older versions
Resolution
Upgrading both NP Server and NP Designer to the most recent version of NPrinting resolved the issue.
Or
Modify the NP Designer executable found here C:\Program Files (x86)\NPrinting\Designer\NPrintingDesigner.exe
Right click on NPrintingDesigner.exe and select 'Properties' from the context menu
Select the Run As Administrator option in the 'Compatibility' tab