[NTG-context] How to prevent empty page after MPpage?

Hello, The following code works OK in mkiv, but in mkii it generates a spurious empty page at the end. How can I get rid of it? (I think that it used to work OK a while ago.) \def\startGNUPLOTpage% {\obeyMPlines\dostartGNUPLOTpage} \long\def\dostartGNUPLOTpage#1\stopGNUPLOTpage% {\startMPpage#1\stopMPpage} \starttext \startGNUPLOTpage draw fullcircle scaled 3cm; \stopGNUPLOTpage \stoptext Thanks, Mojca