Memory filling up

I had some thing strange going on...

I had lots of instances of PRDocument, at one point it reported 88000...

The key to clearing them out appeared to be, re-initializing, 
PRMacroExpander,

Inspecting PRMacroExpander default, the #table dictionary of blocks, 
those blocks
had temps, with a #context defined, and that context had properties etc...

still it freed up 100Mb...

Keith

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