Sale order commitment amount not getting reduced

Question

Dear Experts
Once the Sale order is created the SO committment amount gets updated in reports  (commitment Vs Actual report) with"Forecast of Revenue" and Amount type 0100 (Original).
But after creation of Billing document (actuals) the same  'Forecast of Revenue'  (commitment amount ) is not getting reduced with Amount type (0200). FM document is generated at the time of Billing document generation and the same is showing in reports from Invoice side.
The same cycle is happening in MM i.e, once PR/PO commitment will get reduced after actuals were happened.
Ex:
Ref doc     Item     Val.type text                       Amt type     Payment bdgt
100000     10     Forecast of Revenue     0100          100
20000     2     Invoices                          0100          100
Why SO commitment is not getting reduced in SD module?. Because of this reports are showing wrong.
Kindly suggest.
Thanks in advance
Rao

Answer 1

Dear Mar
Thanks for the support and tried all the possible ways but not able to find out the reaon:
a. FM Accounts assignments (CI, FC,Fund and BP) are same both Sale order and Billing documents.
b. There is no exits are activated. 
c. It is happening all the sale orders and the reduction is completly missing.
d. For your reference please find the below commitment and Actuals report (FMRP_RFFMTO10X ).
Ref doc       Val.type text                    Amount type      CI              FC                Amount 
100107       Forecast of Revenue              0100           100           ABC                 100
256487       Invoices                                   0100           100           ABC                 100
    Because of this when we check budget report the consumed amount is showing Rs. 200/-
e. And also we don't have any PGI concept, only after Sale order creation direct billing document will be generated.
Kindly suggest is there any configuration missing issue or something else.
Regarads
Rao