If you run an analysis on a model with disconnected elements, the simulated flow of plastic through the part may be interrupted at the discontinuities.
- Click
(). - Use the Mesh Connectivity Diagnostic dialog.
- Click
() to toggle the diagnostic display on or off. - Fix the elements using one of the following methods.
- Check the model in your CAD system and re-import if necessary, or
- Delete the disconnected elements if they are unwanted, or
- Use the Mesh Repair Wizard.
If the problem still exists, use the Free Edge diagnostic and study the problem areas. Global Merge or Merge Nodes should fix the problem. For example there can be mesh connectivity problems in the model where the tip of a gate is not connected correctly to the runner beam that is attached to the part after creation. In order to remove this type of mesh connectivity problem, click 
() and check off Merge nodes along an element edge only, if the problem relates to very close or coincident nodes belonging to the runner system.
Note: After using Auto Repair tools, carefully inspect the mesh to ensure that it correctly represents the part geometry.