Hi Dan,
Thanks again.
I have no code in the Supplier Invoice's event.
And I did revert the screen.
The error still happened.
But I found out the problem. It was from other solution.
I thought that my PDI user would only run its current open solution. But to my surprise, the user was running other contents from other solution on the cloud and getting that errors.
I commented some code from that solution. And I am ok now.
Regards,
Fred.