Has my project got corrupted?

Pffffffffew, thanks for your prompt reply Fredo,
you are right; though I wasn’t in “channel batch export”-mode, there were 2 cycle markers checked with identical names… 1 on top of the “export cycle marker”-list (clearly visible) and 1 somewhere deep down that list…

You saved me from a lot of frustration by helping me out so fast. Thanks again.

best, Niek.