Currency Code in OCRN only accepting Alpha characters

Hi,

I'm trying to setup multiple sub-currencies (i.e. EU1 for Avg EUR, EU2 for Mth Close EUR etc..) within the currency table for consolidation purposes (MARI Add-On). The table OCRN indicates that the currency code field CurrCode in nvarchar, so should in theory accept alpha-numeric characters. Likewise the template supplied by SAP for DTW purposes have codes of CU1, CU2, CU3 as examples contained within the Excel spreadsheet.

Are they any reasons why the currency code field should not accept alphanumeric characters? Is there something I need to change in setup?

Thanks in advance,

Jon