Hi Sahoo,
You can create custom DSO. But add before the info cube.
Once you add DSO, your data flow will be like this.
Data source ---> Custom DSO----> Info cube(0FIGL_C20).
First time load:
Data source to DSO --> Full load
DSo to Cube --> Full load, at DTP level choose Active table(without archive) option.
Second time load and further:
Data soure to DSO --> Full load
DSO to Cube --> Delta load , at DTP level choose changlog table option
Pls check the below one.
Thanks