iOS: Missing 64-bit support

[Dan Friedman]

Does anyone know the magic combination needed to get a app accepted by Apple?  I'm using LC 7.0.1, and XCode 6.1.   I uploaded an update to an app this morning and got this error:

ERROR ITMS-90086: "Missing 64-bit support - Beginning on February 1, 2015 new iOS apps submitted to the App Store must include 64-bit support and be built with the iOS 8 SDK. Beginning June 1, 2015 app updates will also need to follow the same requirements. To enable 64-bit in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with both 32-bit and 64-bit code."

Probably a configuration issue of some type.  Any thoughts or advice?

Thanks!
-Dan