Method to display error message on SRM portal?

[former_member615053]

Hello experts, when posting button is pressed after processing an invoice on SRM, there is an error shown (BS 002, "Manually Correct" is not allowed (Invoice 9999999999) . But in spite it is collected on many invoices (using debugger I saw internal tabvle where errors are saved) only a few show finally the error menawhile others show it.

Both cases save the invoice, but error message is confusing users. Do you know what method is utilized to display both messages (successful creation and error) on SRM? If I get it, I can track back debugging what was the logic branch. Thanks