My normal approach to dealing with files that I can't edit, is to do a part copy after which the part seems to become available for modification. That doesn't work for this file.
This workaround aside, I would like to understand what is going on. Any ideas?
Go to Solution.
I think you will find that this is a mesh model, which would explain why you can't modify it. I did an Optimize and it created a whole load of mesh bodies for the smaller text.
it is as already supposd by @Alan
in Your part file there are 17 mesh bodies, that mean not only one single mesh body, no 17 bodies.
So heer the best would be to use the new ST10 capabilities of integrated modelling (mesh and b-spline) or to run the Reverse Engineering for converting the mesh boodies back to b-rep models.