Keywords: synthesis, simulation, implementation, module
When adding source files to a Project Navigator project, if two source files share the same module name (e.g., one for synthesis/implementation and the other for simulation), the source file association is not respected. For example, a simulation-only source file might be displayed in the Synthesis/Implementation view.
In these cases, the association is typically shown incorrectly while adding files through Project -> Add Source. Even if the file association is changed to the correct association while adding sources the change is not honored.