Both images were rotary processed. Something is obviously wrong. The horizontal image is a 6x7 developed in a Paterson tank with ID-11 1+1 for 11 minutes with 1500 ml of solution. It's pretty typical of the roll, with the undeveloped area typically in a corner, but to a lesser extent throughout the image. I've also noticed this occasionally in 35 mm. It's never happened with intermittent agitation.
The vertical image is a 4x5 developed (rotary again) in a Jobo tank using 2 litres of HC110 dilution H for 9 minutes. I've had this problem to a lesser extent before, but here it's on all of the 8 images that were developed together. I left the centre slot empty on both reels. The film is Foma 200, but this ain't the film's fault!
In both cases the film was loaded correctly - I checked before removing the film. Also, I reverse the rotation about half way through the development and fixing.
I'm obviously doing something very wrong here. I can fix it on the 6x7 by forgetting the rotary bit and just doing intermittent agitation, but can I do that with the Jobo reels or are they designed strictly for rotary processing?
Any other ideas on what me and/or the machine is doing wrong?
The rollers turn Jobo tank (4x5) at 38 rpm, and the Paterson (6x7) at 48 rpm.