context@vivaldi.net schrieb am 22.05.2020 um 14:54:

Hello,

the following code doesn't produce vertical rule between columns:

---- \starttext   \startsimplecolumns[n=2,rule=on]     \input knuth   \stopsimplecolumns

  \blank

  \startcolumns[rule=on]     \input knuth     \column     \input knuth   \stopcolumns \stoptext ----

My fault? Bug?

Yes and no. Simplecolumns are as the name implies a few very simple mechanism and don't support vertical lines between the columns. The normal columns environment uses the mixedcolumns code where you have to use "separator=rule" to get a vertical line between columns. Wolfgang