If you add prefixes to enumerated names in the generated code, you enhance readability and avoid name conflicts with global symbols. For details, see Enumerations in the Simulink Coder documentation.

This guideline prevents name conflicts with other objects in a chart. If an enumerated value uses the same identifier as a data object in a state or a bus field in a chart, the chart does not resolve the identifier as an enumerated value.

For example, the following diagram shows the stages in which a chart tries to resolve the identifier Colors.Red.