https://i.imgur.com/JNjp6QT.png
Hi,
Does every msh file cause this error on your system?
I had this error with one of my own msh files. After triangulating it I was able to view it.
I think the main problem is, that the msh file, which you want to view is not done perfectly(f.e. bad clusters...). (I think although the game engine can perhaps handle it, it can make problems on the viewer then) Sorry of my English.
Edit 30.3.18 18:00 :
I opened the gamorean msh file showed on your picture and it was working on my viewer...