Three years later... Hoping for new insights to a previously report problem...
I came up against this issue with my recently acquired F100 today. It's about the fourth roll I've run through it. It was a roll of Rollei Infrared 400. Everything happened just as
@Joseph Bell reported. It just kept telling me
End when the roll was less than half done. It started doing it sporadically so I could get a few more shots off, then stubbornly displayed
End, I was able to rewind it (in the camera) and I"ll see if anything looks odd structurally when I develop it.
Oh, and in reply to some of the earlier comments, the camera does
not count exposures then stop. Neither did my N8008s. In both I can get 38 exposures on the 36 exposure roll and 26 exposures on a 24 exposure roll. The camera just advanaces this film until it can't. So it might just be the film got "stuck" somewhere/somehow.
Also, had fresh batteries in the MD-15 battery grip, so I had
extra power.
@Joseph Bell, have you (or anyone else) seen this happen again???