Did you maybe try with function "Write-off Prepayment"?
http://www.hansamanuals.com/main/english/mailnumber___3396/theconf___516/manuals/levelzero___3393/version___71/hwconvindex.htm
Thank you for your post Lilian. I see this post has been submitted twice and the second post is being addressed so I will close this duplicate.
Thank you. ...