MAX HULLS EXCEDED, whats this mean and what is the maxium number ?

[Alt Lexington]

When I try to upload a mesh model to Second Life I sometimes get a message saying MAX HULLS EXCEDED, I wish to know what this means and what the maxium number actually is ?

[KarenMichelle Lane]

This is discussed here:

http://community.secondlife.com/t5/Mesh/I-get-an-Error-Message-when-trying-to-upload-a-Mash/td-p/934199