Hey John
I've never seen that particular error before but it could be related to your geometry or to your mesh. Have you drawn the geometry yourself or is it imported?
Is it possible for you to send the model itself?
Regards
I drew the geometry by myself in AutoCAD 2010, and exported it as an *.stl file format, and them used COMSOL to import that file. Is this the proper way to import files from AutoCAD?
Sure it is possible, here's the model attached.
So, maybe I have to redesign the model again? Is it that COMSOL cannot create mesh for complicated models? (Or it could create mesh but with high possibility of having errors, warnings, etc.?) Thanks for replying my post Mikael.