You're asking it to hold more than one object {} for the loop in that macro. 
Use a union {} wrapped around the while loop instead and that should solve 
it.

I was going to back my answer up with proof from the Doc but all I found was 
the usage of object {} containing one item but not anything saying it 
couldn't hold more than one thing at a time. Which doesn't mean that it 
might not be explained anywhere, only that I hadn't seen it said.

-- 
Bob H  www.3digitaleyes.com
http://3digitaleyes.com/imagery/

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