[NTG-context] Is the \definecolumnsetspan still supported!?

Hi all, I want to use the \definecolumnsetspan for typesetting text in columns as described in the Columns manual (2003) by Hans, but get an Undefined control sequence ... error when using it! Maybe all this is not supported anymore but I don't know for sure. Anybody any idea on how to proceed?! Regards, Gerard Verhaag