MAV BLOCK MISSING Whenever I try to upload mesh with modifier?

[Antumbra]

everytime I try to upload my mesh with the subdivide modifier I get this error? how come? I tried to apply it before exporting it and it still didn't work... it uploads fine without the modifier... I've been trying to figure this out for 2 days now I need help :( I have no materials or anything so Idk what could be the problem.... How can I upload my mesh with the modifier without getting the error?

[Rolig Loon]

That's a recurring question here.  Take a peek at this thread and see if anything in it helps >>> http://community.secondlife.com/t5/Mesh/MAV-BLOCK-MISSING/m-p/2830342

[Antumbra]

Nothing's working

[Drongle McMahon]

How many triangles do you have, according to the the uploader, before and after you apply the modofier?