"Round Off Account"-Error for only 1 specific supplier

Hi all,

I am trying to create and amend purchase invoices from one specific supplier but get the following error message when trying to submit: Please mention Round Off Account in Company

I tried:

  • Verifying that the round-off account has been properly defined as described here.
  • Creating purchase invoices for other suppliers (works perfectly normal).

Does anyone have an idea what the problem might be?
How can I go about fixing it?

Thanks in advance!