ArgumenNullException from System.Data


I ran my code to the end, no error appear in the output panel. But an error warning pops up in the end as below.

The last line of my code is a writeline activity and I can see the content in the output panel. So I really have no clue where this error come from.

Could you help me out with it?


Run the workflow in debug mode to find out the exact line…

You are trying to assign something which does not have any value

Hi, I run the debug mode but nor error captured in any line. That’s why I find it’s really weird.

Please share the workflow