Problem with MTO scenario with Co08

Hello PP gurus,

I am running an MTO scenario.

I created a sales quotation and a sales order.

When I try to create a production order using Co08 with the sales order I get an error message as follows:

*Account assignment cannot be carried out because of different origin no.*

*Message no. V1134*

Diagnosis

The sales document to which you want to refer is based on sales document 20000011 and item 000010. Therefore, the settlement and possibly inventory management are carried out using the number of the preceding document.

System Response

This entry is not allowed.

Procedure

Enter the document and the item number of the preceding sales document.

I entered the the quotation in Co08 and then I am able to create the production order.

I also created the planned order using MD50 then converted it to production order.

The production order has the sales quotation instead of sales order.

Is this how it is supposed to work?

What if the sales order quantity changes?