Thank you! And where do I need to change paths? In "about" point of menu I see such information: $ISE_EIFFEL = C:\Program Files\Eiffel Software\EiffelStudio 7.0 GPL $ISE_LIBRARY = C:\Program Files\Eiffel Software\EiffelStudio 7.0 GPL $ISE_PLATFORM = windows $ISE_C_COMPILER = msc In general.eis_path I changed the path but it does not solve the problem.