I have had one of my user getting the above error in invoice update for a packing slip in a purchase order a while back. Since then I applied invoice all option in the parameter to invoice to take care of the issue at the moment. But now I found out that this error" Financial updating quantity must have same sign in the posting unit and the stock unit." have been addressed by Microsoft in a hotfix - RU3 version. We are applying that hotfix in our instance as well but before that, I want to recreate the same error in my test instance so we know Hotfix has fixed the issue.
I am not able to recreate the error in my instance. I will greately apreciate anyones suggestion on helping me on how to recreate this issue.