ME22N change Exchange rate type at price condition level

Question

Hello,
In ME22N exchange rate type is 'M' by default. When a price condition has currency different than purchase order this 'M' rate is used.
Now I need to change this 'M' rate but for particular price conditions (and exchange rate type can be different for each price condition). Don't ask me why:-) This requirement comes from business consultant and he knows that there is no user exit for this. I need to modify standard. The problem concerns items price conditions.
I'm not asking you for a complete solution, but maybe you can give me a hint where to start? What is the function module which perform price calculation (where exchange rate is used) in ME22N.
I tried to change KOMK-KURST in price condition rule (the procedure which is called to check if price condition has to be calculated or not). It is called for each price condition and I know a name of price condition. But I think the exchange rate type is read at the beginning and stays unchanged even I changed KURST.
I also found function module READ_EXCHANGE_RATE, which has rate type 'M' by default. I could put my modification in place where it is called. But it is not called when I press button Update price. It is only called when I change the currency of condition and press enter. This FM is called in few places in ME22N but not when I'm refreshing prices. Maybe during a refresh it has already an exchange rate? If so, READ_EXCHANGE_RATE could be a solution, but... It is not called when price conditions are created for the very first time (when I create PO item). Maybe system calls different FM?
I also tried to use trace (ST05) to see where systems reads from TCURR, but I think some buffers are used and TCURR is not in trace.
So now I'm stuck hoping for your help.
Best regards
Rafal

Answer 1

Prabhu Peram wrote:
Hello Rafal ,
>
> still im trying to understand your requirements , anyhow if you change/propose new exchange rate at header level , then system wont put type as 'M'.
>
The problem is that if I set a new exchange rate type, it will be the same for all price conditions. My requirement is to have different exchange rate type for each price condition. The pricing procedure will loop at each price condition, and depending on condition name I need to have different exchange rate type.
Example:
condition XMER is in EUR and must be converted to USD (factor should be 1,234)
condition XMET is in EUR and must be converted to USD (factor should be 1,567)
Now the factor is the same for all price conditions.
I have found interesting table XKOMV. It contains price conditions and there is a field with factor value. Now I will look for the place where this table is filled with data or for the place where I can modify factor values before XKOMV is used in pricing procedure.
Best regards
Rafal