Yes, there was a case the Script was not prepared for.
If you select any of the first 4 options for the base of the leftmost element, then the Top of this leftmost element is set to "Colonna", but there is no such element, which gives the error message, but the 3D is good regardless. Only it is annoying.
I slightly modified the 3D Script of the element so now it is working fine.
Find it in the attachment.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
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2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28