Hi Khader! You normally get the message that the app is "locked for edit in another session", and would you like to override the previous edit with this current session? It simply means you have more than one web edit going for an app. I see these all the time. I use chrome primarily, and I get this too. As for the rename of the existing app, regardless of the author this is just a warning to you that the app has been published and has a public face, so if you rename it, the public will be affected by the new name too. (sometimes it takes a while for it all to sync up though, so be patient.) What you can also do (to get a comfort level with the rename) is to make your own app generated against any datasource, then rename it to see how it goes before you rename the app folks have already been using. I always do this type of thing when I have any questions about the effect of a change I am making, since other people are using the code you are tweaking. Have fun with it, and best of luck! SmartMeter