Automatic update net price in PO creation

Question

Dear expert,
I just found an issue while creating a new PO.
I fill in all data needed, included net price. And when I press "enter", surprisingly the system automatically update the Net price with last PO price. and I need to manually change again the net price with current price.
Anyone can describe why system automatically update the PO price? is there any setting to inactivate it??
thanks much,
nasikhin

Answer 1

Hi,
Please read the note:
456691   FAQ: Price determination in purchasing
3.  How does price determination determine the conditions via a 'Last
    purchase order'?
Answer:
If the info record does not contain any valid conditions, but a "last
document" exists for the info record, the system copies all of the
conditions from this document if the following prerequisites are met:
    o  The net price must be zero (EKPO-NETPR = 0.00) after the system
       has carried out price determination.
                                                                 Page 5
       However, the net price is not zero after price determination has
       taken place and the system does not copy the conditions from the
       last PO if master conditions that are included in the net price
       calculation are maintained at, for example, vendor level or
       material group level.
    o  The last document is not a request for quotation.
    o  The info record has not been deleted.
    o  The vendor and the material in the info record are identical to
       the vendor and the material in the last document.
    o  The calculation schema of the last document is the same as the
       current schema that has been determined.
The system simply executes a copy function to transfer the conditions
from the last document. The system does not check for requirements for
the calculation schema.
The system does not copy the condition records of the subsequent
settlement (the condition type has the condition class "C"); instead,
they are always determined again to ensure that the condition records
are consistent with the field contents (also see Note 486757).
If you generally do not want the system to transfer the conditions from
the last PO, you can use the user parameter EVO to deactivate this (also
see Note 675523).
So you can use the parameter EVO.
Best Regards,
Arminda Jack