Marwane

I didn't use to have this issue, but now when i try putting my ORAS rom in PKHEX, it says that the input file is too large. I didn't play my rom for like a good 3-4 months, and when i used to play i could use pkhex without issues. Can anyone help ? I am also on the latest version of the software and didn't use save states (i saved ingame)