Healing with CAD Integration
It is not possible to use the Heal command in Ansys Electromagnetics Modeler. Instead, similar healing options are available under UDM properties option tab:

The Healing options are None, Auto and Manual. By default, healing is off (None) and should be turned on only if required.
Related Topics
Ansys Electromagnetics CAD Integration Through Workbench
CAD Integration and Geometry Sharing
Bi-Directional CAD Integration
Multiple Geometry Links for CAD Integration
Important Geometry Options for CAD Integration