Hi Hans, the latest beta is unabel to load external modules. luatools knows where the module is: luatools t-simpleslides.tex /Users/tas/texmf/tex/context/third/simple-slides/t-simpleslides.tex And yet, it claims it's unable to find it (after saying it has loaded the module): system : module simpleslides.tex loaded ! I can't find file `t-simpleslides'. <to be read again> \relax \dodoreadfile ...ax \inputgivenfile \readfilename \relax \the \everyafterrea... \next ...)}\settrue \moduleisloaded } \donothing } \stopreadingfile <argument> ...es \f!thirdprefix {simpleslides.tex} \dododousemodules \empty {... \firstoftwoarguments #1#2->#1 \dodousemodules ...}}{\dododousemodules {#1-}{#2}} \ifconditional \moduleislo... ... l.6 Same file compiles fine with current stable. All best Thomas