@Soroush. Sorry for the late response. This error normally occurs when there is no matched sources between annual (PTINV) and daily (PTDAY) fire inventories based on FIPS, SCC, FireID and other source characteristics. I would suggest to check those characteristics between the files and make sure they are shared correctly.
PTINV: https://www.cmascenter.org/smoke/documentation/4.7/html/ch08s02s08.html
PTDAY:https://www.cmascenter.org/smoke/documentation/4.7/html/ch08s02s06.html