If a body has an assigned material, the density of the solid body cannot be
edited using 'Solid Density'.
Solution
The assigned material will have to be removed before 'Solid Density' can be
used to change the density of a solid body.
To remove the assigned material:
1. Select 'Tools-->Materials-->Manage Materials'.
2. Set the Material List to 'Local Materials'.
3. Select the assigned material in the listing window.
4. Select the 'Remove selected Materials assignments' icon.
6. Close the Manage Materials dialog.
7. Select 'Edit-->Feature-->Solid Density' to change the density
of the solid.
8. Re-apply the material if necessary.
Notes