Mike Williams wrote:

> That chunk of code ran without error (once I'd added a wodge of
> #declares and #includes of stuff that it expected to find). I guess your
> error might not be in this code. Perhaps some other part of your scene
> outside this code fragment is inadvertently redeclaring IsoMeshArray.
> 
> Perhaps you could post a small complete scene that exhibits the problem,
> rather than a code fragment that doesn't run stand-alone.
> 

Sorry about that.

I believe this line was the error:
#declare IsoMeshArray [i/(indx+1)] =
It's not just that it lead to the error. It made no sense.

Should have been:
#declare IsoMeshArray [i/(indx*16)] =

I could have developed that part of the code without using the 
unfamiliar stuff, then added the iso_csg syntax.  So I am embarrassed 
all round.  Jim

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