Hello Shaun,
I apologize for the trouble you've experienced. Please use the attached script to generate the Sun sky map points instead of the one on the resource center link. That one will be updated with the one attached here shortly.
hi Kduri -esristaff - I think the Python code has a problem -Attach the corresponding image
If cityengine is using python 3.x, then that may be due to differences between try except error raising between python 2 and 3