u/No-Elk-7198

hi, today I developed a roll of Fomapan 400 with somewhat old Rodinal (1+50, 12min) and the whole roll is completely blank- even the film leader is just slightly darker. What could have caused it? I would suspect my mistake in exposing it, but it doesn’t explain the film leader being blank. Could old fixer cause it? I’m not sure how many films I already fixed with it, so it might be oversaturated, but in this case I think at least something would be visible? I’m really puzzled, so I’ll be grateful for any ideas so I don’t ruin more film XD