[metapost] circleit.aa does not work.

[Taco Hoekwater]

John wrote:
> Hello,
> 
> The example code below hangs after invoking mpost, with the following 
> text "... ! Isolated expression. ... . I believe that I am missing the 
> source for these wondrous macros, that would be instrumental to my being 
> able to generate the graphics, flowcharts, and such, that I need to do. 
> Any guidance would be greatly appreciated.

starting your document with 'input boxes;' should fix the problem.

Cheers, taco