Yes, the error looks similar. I would suggest to do the following: 1. Exit EiffelStudio. 2. Remove directory "c:\program files\eiffel software\eiffelstudio 6.2 gpl\precomp\spec\windows\EIFGENs". 3. Remove directory "EIFGENs" next to the project file, for example, for "F:\Projects\Eiffel\traffic\traffic_ev_1079\example\02_objects\objects.ecf" it is "F:\Projects\Eiffel\traffic\traffic_ev_1079\example\02_objects\EIFGENs". 4. Start EiffelStudio as you did last time. 5. Open the project and compile it. 6. During compilation you will be asked to precompile a library. Answer "yes". Please, let us know about the results.