Lol! You know what, just as I was doing what you suggested and copied and pasted the error message to post on here, the answer jumped right out at me and I was able to sort the problem. All I had to do was change the mesh face number to greater than the number of faces I had in the polygon model and hit convert. I sometimes panic when things don't go according to plan. Thanks for your help :O) this was the message: *****// Error: polyToSubdiv1 (Poly To Subdiv Node): Cannot create subdivision surface as the resulting surface would have more base mesh faces (2238) than the maximum allowed (1000). // To increase maximum allowed, change Maximum Base Mesh Faces in Convert to Subdiv Options. // *****