10000171 
Message
Change accounts receivable/payable?
Diagnosis
In the Business Partner Master Data window, you have either added a new business partner or have updated an existing business partner. On the Address tab, in the Pay to or Bill to area, you have tried to update the Country field for a business partner that is not linked to any transactions. You have attempted to change the country specified in the default Bill to / Pay to address of a business partner from your company's country to different country or from the current country to your company's country. In order to continue, you need to set the control account for the business partner.
Procedure
Do one of the following:
To post the transaction to a different account, choose Yes.
To post the transaction to the current account, choose No.