Hi Wicaksono,
Thanks for your question and for providing screenshots of the problem you are experiencing.
LEAP is operating correctly by greying out Historical Production - this data is only required when the First Simulation Year is set to any year after the Base Year. When the First Simulation Year is set to BaseYear (as it is for the oil refining process in Training Exercise 3), LEAP calculates energy production from the Base Year onwards using the specified process Dispatch Rules.
It is possible that when the official Freedonia data set was created, the Historical Production data was inputted before the First Simulation Year was changed, which is why a value was provided for this parameter, even though it is actually calculated by LEAP. If you change this value to zero, the results are not affected. This is verified when you go to Results View > Transformation: Outputs by Output Fuel for the Oil Refining branch and take a look at the Base Year (2010) value.
If your results do not match the exercise results, refer to the "Hints" in Section 3.6 of the Training Manual which provides guidance on things to look for when troubleshooting your model.
Hope this helps!
Emily