I’m very curious to hear about this documentary 
This is definitely an issue with using an outdated version of statsmodels and a relatively recent version of dataframes. I think the compatibility for changes in the dataframes API didn’t land until after the 0.6 series was released, which is quite different internally but should still be compatible with GLM etc. (and appropriate version bounds should be in place in the General registry, but I’m not sure what juliapro uses). If you’re having trouble with StatsModels.jl please let us know (and feel free to tag me and I’ll help if I can)! We’re happy to help.