I try to analyze the electric production of a ship. In my reference scenario I want to change my all of technologies with Hydrogen fuel cell. So I used Training exercise 1, and from 2017 to 2020 I use diesel and fuel oil to meet the electric demand as it shown in picture above. But when i try to add hydrogen to meet my electric demand from 2020 the results are seen unwise. i used step function to retire all the other demand in 2020 but in the analysis hydrogen start to meet all electric demand from the year 2017 and the other sector seen as a non-active. How can i fix this problem? I think i made a mistake in somewhere but i can't find it. thank you for your cooperation.