Hi, Manu, After I maximized the error list tool in standard Eiffel Studio 6.2 layout, quit Eiffel Studio, restart Eiffel Studio, everything works fine on my Eiffel Studio 6.2.7.2969. I tried to reproduce with the debug data you attached. The debug layout data attached (“debug.dck”) doesn’t have tool bar data recorded indeed. So there is no toolbar to restore. This problem cause toolbars lost. It’s very helpful if you can remember the docking layout before “After maximizing the error list window and then exiting EiffelStudio and restarting it, I had lost the editor area.”