Thanks Max

That has fixed the problem.
I have attached "extension.zip"
with fixed infonodes.js included

Thanks again
James

PS Attempt to run "pentakisDodeca&TruncIcosa.nod" (attached)
gives the error message in red box, however does generate result
albeit with pentakisDodecahedron in default colour rather than red.

Generally, I get the main error alert showing when navigating in
NE interface.

Hope this helps!