Thats strange, exactly what you do above gives the error “Split not defined”. I am on Mac…and still works for REPL, all packages updated. tested 1.6, 1.7, 1.8…
Thank you all for looking into it. It seems I didn’t understand the intricacies of the Pluto Pkgmanager. In my Julia install the DataDrivenDiffEq was 0.8 but when looking inside Pluto with Pkg.status() I had 0.7. So I just learned that one can/must update the package within the notebook by clicking on the check check icon next to the using {Package} and then arrow up icon. On reading more about the features of Pkgmanager within Pluto I see that its very useful, but I had missed this aspect, thinking it was enough to update in the main Julia REPL.