Enables or disables viewing communication errors. For example, if there is a SetPoint on a Screen that is linked to an I/O Tag, and communication between E3 and this Tag fails, the text configured in the CommErrorText property is displayed in that SetPoint, with a color configured in the CommErrorTextColor property and a SetPoint's background color defined in the CommErrorBkColor property. Default value of this property is True. This property cannot be changed at run time, even if E3 Viewer is inactive.