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Yes, the unit structure is as I would expect (I have attached a screenshot)

I am trying to fit a four-level cross-classified model for binary responses using the MCMC method. In order to obtain starting values I use the 1st order MQL estimates, which works fine (and the values definitely make sense). But when I then switch to MCMC and specify the model as cross-classified ...

Thanks, changing the max number of levels fixed the problem...

I get exactly the same error message when I try to run a four-level model (right at the beginning, when I start specifying the Y variable, before estimating it). It also happens when I select a different dependent variable. I have no problems specifying and running three-level models. My version of ...