[NTG-context] \doifnotmodeelse - undefined control sequence error?

Hello ConTeXist. I do not know if I'm not mistake somewhere, but it seems to me that the macro \doifnotmodeelse does not work. Can anyone verify this? Jaroslav Hajtmar Here is a simple example: \enablemode[mymode] % \disablemode[mymode] \starttext \startmode[mymode] mode 'mymode' is enabled! \stopmode \startnotmode[mymode] mode 'mymode' is disbled! \stopnotmode \doifmodeelse{mymode}{mode 'mymode' is enabled!}{mode 'mymode' is disbled!} % Undefined control sequence error ??? % \doifnotmodeelse{mymode}{mode 'mymode' is disbled!}{mode 'mymode' is enabled!} \stoptext