Sales Order quantity Must not exceed Purchase order quantity

Question

Dear Experts,
My requirement is when i am creating a Purchase order giving referenece as Sales Order .. system must not allow the user to enter  more than Sales order quantity.
Ex : Sales Order 1234
        Material : AAAA
        Quantity : 100
while creating a Purchase order for Mat AAAA giving  reference of Sales order i.e 1234 and quantity 150 system must not allow user to enter more than sales order quantity . If user wants to create PO for 150 he must have to ammend the sales order from 100 to 150  is it possible.
Kindly do the needful
Regards
abhi

Answer 1

Dear Abhinav,
First of all, Purchase Order will get created with reference to Purchase requisition (T. Code: VOV7 --> Item Cat.: TAS --> Tab: Transaction Flow --> Field: Automatic PO Creation), and not with reference to Sales Order.
This is Purchase requisition, which gets created with reference to Sales Order; based upon settings in:
T. Code: VOV6 --> Schd. Line Cat.: CS
Order Type            NB    Purchase Requisition
Item Category         5     Third-party
Acct Assgt Cat.       X     All aux.acct.assgts.
Now, coming to your requirement (based up on my inputs),
My requirement is when i am creating a Purchase order giving referenece as Sales Order .. system must not allow the user to enter more than Sales order quantity.
To Restrict Purchase requisition quantity in PO, then in T. Code: OMCQ
Or, Path: SPRO > img > MM > Purchasing > Environment Data > Define Attributes of System Messages
Here make following messages as Error;
06 076 Materials of requisition & item & alr. ordered in full
06 254 Order quantity greater than requisition quantity
Now,  in Purchase Requisition, if it is created for 100 qty (with ref. to Sales Order) and if you adopt the same in Purchase Order and try to change the qty to 150, then system will not allow you change and throws the error.
Best Regards,
Amit