I just processed four rolls of 120 film in Pyrocat HD and all of them came out completely clear. I make a fresh batch from two solutions that are less then 2 months old with distilled water before each developing session. Mixed 1+1+100. I haven't processed any rolls in about month and a half and last time I did I used the same developer with great success. The film I processed included two rolls of TMax-100 and two rolls of HP-5+ at ISO 200. I used the Paterson double tank for each set of film. I used Massive Dev chart app for time and temperature and I developed the TMax for 14:45 min @ 21C and HP-5 for 14:06 @ 20C after 3 min of presoak in distilled water. So that's the technical info. Now the rolls I went with were picked at random from a stash of film I've had waiting for processing in the fridge for about 2 months. And I don't label my film so these were picked at random out of about 20 rolls. So I'm trying to figure out if it's possible for me to completely ruin the exposure on four random rolls. And I doubt it because I didn't even get the name of the film or frame number to show up. So what happened? Where did I mess up? I figured I'd ask here before I go ruining another two rolls. Any tips would be greatly appreciated.