Hello,
I also have a problem with a chain i made in blender. It's a necklace chain i did it with the chain addon but when trying to upload it in sl i got the infamous mav block missing error, i redid that damn chain so many times with less detailed links hoping it would be less heavy and work better, but i still get the error.
I clean the chain, nothing is missing, no face missing no useless vertices, and it's not really heavy for a necklace, i'm at a loss here, i'm not sure what im doing wrong or missing, i deleted all extra parts like the empty or the circle, it's just that clean chain and i cant do anything with it.
If someone has an answer i would love it.