Swept Wing Meshing in Gambit

nick

Hi, i am trying to create meashes for wings at different angles of attack in increments of 10 degrees.

For 0 and 10 degree sweep i had not difficulty in just sweeping my 2d mesh, then using intervals to fill in separate the volume using the 2d mesh as my base mesh.

Now though when i got to 20 degree sweep, it is erroring during the sweep comand and telling me i can not use a cooper mesh to mesh this,

Anyone got any ideas on what i need to do??