Tried that, but all of them said "Cannot delete border edges".

I just fixed it. Looked in the Script Editor and it told me to run this command on all the polys:

select .e[949] ;string $v[] = `polyListComponentConversion -fe -tv`;select $v;polySplitVertex;polyMergeVertex -d 0.0 -tx 1;

Hope this helps someone. Mesh converts to Subs no prob now.

Steve