[NTG-context] [NTG-Context] MetaPost capacity exceeded.

! MetaPost capacity exceeded, sorry [expansion depth=10000]. I have come across this error previously with run-away \dorecurse loops I now have this message with a document that makes VERY heavy use of MetaPost; I just have too many figures. Is there some way to "flush" the running instance of MetaPost, that is to force MPlib to respawn or something like that? (Of course, I would then have to be careful not to rely on the reuse of any previous MP instances...) Alan