Hi.

I'm experiencing some compatability issues. For some reason, a .dwt file that I revised in C3D 2010 is now, no longer functioning with ACAD '09. When my colleagues try and open the file in 2009, it is saying that it was created with an incompatible version of AutoCAD.

The file has been saved in the .dwt format, and should work so I'm a little confused.

Any Ideas?

Thanks,

Sean