2912560 - How the Currency is Derived in Manual Purchase Request.

In a manually created Purchase Request, the currency is not being derived as expected from the Supplier master data. 

SAP Business ByDesign.

1. Select the work center Purchase Requests and Orders.
2. Select the Purchase Requests view.
3. Search the Purchase Request ABCD (ABCD being the ID of the document).
4. Open and view All the Document.
5. Under Items tab > Basic Data sub-tab, you can see that the currency has not been taken for the associated Supplier.

Since a Purchase Request can include multiple Suppliers (One per item or even none at all), the system cannot rely on Supplier currency to determine the overall Purchase Request currency. 

Therefore, the system defaults the Purchase Request currency to the currency of the buying company.

  2706196 - How the Currency of Purchase Order that is Created From Purchase Request is Determined 

Purchase Request; Wrong Currency; Incorrect Currency, Buying Company Currency. , KBA , SRD-SRM-PRO , Purchase Requests and Orders , AP-PRP , Purchase Request Processing , Problem