I have read and tried all of the suggested changes to change the default PO document type in transaction ME57 and none of them work. We have ECC 6.05 and I have a custom requisition type (ZD) that can only be converted in another custom PO type (ZDS). I want ME57 to default to the PO type ZDS when it is converting a ZD requisition. I have read that the system will use the default document type associated with transaction ME21. I have set this to ZDS. Table T160 says documents type ZDS. I have changed the field selection set to ME21 for the order type ZDS thinking this might have some influence. None of these changes do anything to change the default document type in ME57 from NB. We are fortunate in that these transaction will always be done in a single plant number, I have changed the default PO type for this plant to be ZDS. I know this will only impact the MRP order type created, but I thought it might help, but it didn't. Any additional suggestions would be appreciated.
thanks,
Dennis Phelan