I wanted to demo an app using a custom CMS to drive menu options and custom html pages so I chucked some code up quickly and it all looked ok to me - jsonlint agreed but xcode didn't. No worries, I'll do my demo with standard BuzzTouch and talk through my "vision". I then rebuilt the app and downloaded it, ran "clean", even rebooted my laptop, deleted the derived data subfolders and I'm still getting errors BUT the errors refer to an itemId from my version of config file, not the one it should be using. If I use spotlight to search for the string it says it's not in any file. If I view BT_config.txt in xcode it's as BuzzTouch generates it If I view both the design mode and live mode data config options they're both as BuzzTouch generates it How do I really clean xcode?

<root drive>/Users/<username>/Library/Developer/Xcode/DerivedData/<appname>-<random> is where it lives, so if you've deleted those, then I don't think there are any more copies or cache hanging around. From time to time, when things got a little funky for me, and I wanted to push the big reset button, I would also delete the app from my device, or from the simulator. That also removes any appdata cached in whichever test environment you use... Cheers! -- Smug

You can reset the Simulator. That will delete all the files. -- Niraj

Sounds like the app is using cached config data to me. Removal from memory as Smug suggests is a good thing to try.

It finally came right, and when I switched back to my custom code it was ok too. Something obviously needed scrubbing. Thanks for the help!