Denis Maier schrieb am 17.08.2019 um 17:49:

Ok. With this I don't get the empty page. But the setupcolumnsetlines has still no effecgt for the second environment.

===

\definecolumnset[One][n=2]

\setupcolumnsetlines[One][1][1][9]

\definecolumnset[Two][n=2]

\setupcolumnsetlines[Two][1][1][5]

\starttext

\startcolumnset[One]

\input knuth

\stopcolumnset

\startcolumnset[Two]

\input knuth

\stopcolumnset

\stoptext

The settings for the second columnset work when the first columnset goes over of two or more pages. Wolfgang