Hello Lewis,
I exactly wanted to ask for this feature.
Did you try with the error handling in the service integration ?
Like you handle an error which would be a Success message. Perhaps it will appear in the "Process documents with error" WCView. I need to test it.
You can refer to the section "Error handling" in the studio doc.
If I find something I will keep you up to date.
Thank you for your attention.
Best regards.
Jacques-Antoine