I'm not sure but I suspect you need to use
lock vertexdata for mesh.
Have a look at this thread:
adding mesh data
and this snippet:
set display mode desktop width(), desktop height(), 32
sync on : sync rate 60 : sync
autocam off
position camera 0, 0, -500
point camera 0, 0, 0
make object plain 1, 100, 100
make mesh from object 1, 1
delete object 1
make object plain 2, 100, 100
position object 2, 200, 0, 0
make object plain 3, 400, 10
make mesh from object 3, 3
hide object 3
lock vertexdata for mesh 1
add mesh to vertexdata 3
unlock vertexdata
` now make a new object 1 from the revised mesh 1
make object 1, 1
position object 1, -200, 0, 0
lock vertexdata for limb 1, 0
nv = get vertexdata vertex count()
unlock vertexdata
repeat
text 20, 20, str$(statistic(1))+" "+str$(nv)
yrotate object 1, object angle y(1)+2.5
sync
until spacekey()
end
You'll need to do a bit more to get both sides of the new object to show (DBPro plains are a bit special) and other things may need fixing but at least you'll be able to see something.