.
If any of the following warnings 
and errors 
occur when you run a simulation, resolve them as indicated.
- Can not run. Some materials are not defined correctly.
- Click Assign Materials to view the material status of the parts. Apply material overrides in the Simulation environment or return to the Model environment and assign materials to the appropriate parts.
- No load defined
- Apply loads to your model to simulate the appropriate boundary conditions.
- No constraint defined
- Apply constraints to your model to simulate the appropriate boundary conditions.
- All loads are acting on entities which have fixed constraints applied on them.
- Allowed in cases where you have compatible load and boundary constraints on the same entity, such as, force in Z direction, and fixed in X direction. The warning alerts you to a potential compatibility issue.
Compatibility resolution: Ensure that forces are not applied in the same direction as a fixed boundary.
- Design attributes... are applied to a contact surface
- Occurs when the load or boundary condition is applied to a face that also has a partial face contact condition. The area of the face that does not share the contact accepts the load or boundary condition. The contact area respects the contact condition.
- Degenerate parameters
- Parametric dimensions have caused a modeling error such as removing features or faces. Try a smaller range of values.
- Degenerate mesh
- For assemblies, a part disconnected from the rest of the assembly, or the mesh in a contact area is too coarse and requires refinement. Use Mesh controls to edit the mesh.