Activity Plan, Actual Rate Calculation

Dear All,

We have been for many times performing period end closing. One of step we also have to performe is actual rate calculation using tcode KSII followed with revaluate activity rate in production order using tcode CON2. Somehow, this month the actual rate calculation is not working properly, the actual rate result is zero. Based on my previous experience for this I have to entry any number at the column Activity Plan of tcode KP26.

Anyone have a clue why this happened?Is there any changing in configiration?

Many thanks

Best Regards,

EW