One problem is here:

var intermediateIndex = 
Math.round(tmpThis.direction.getPolyline().getVertexCount() / 100);
for (var n = 0 ; n < 
tmpThis.direction.getPolyline().getVertexCount()-intermediateIndex ; n+= 
intermediateIndex )

In situations where there are less than 50 vertices on the route 
polygon, you round intermediateIndex down to zero. So you're effectively 
doing:
   for (var n=0; n<32; n+=0)
and it takes an infinite number of iterations before that loop 
completes.


There may well be other things going on, but I think you might be doing 
something weird with the error handling that my debugger doesn't like.

-- 
http://econym.org.uk/gmap
The Blackpool Community Church Javascript Team


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