Apologies Noel. I addressed my earlier reply to Neil rather than Noel. Which version of processing are you using? I get failure (only for 3D sketches) on 64 bit Win10, 32 bit Win7, 32 bit WinXP.
I attach a copy of the error listing with Primitives3D on 64 bit Win10. I get different errors on 32 bit Win7.
Regards
Peter Turner
(Attachment processing_error_log-3D_sketches.txt is missing)