CTexture.m Use of undeclared identifier 15 issues when trying to build in in xcode 7

I've made sure that all my software is updated in MMF2.5 and on the mac which is using OS X El Capitan version 10.11.3 with xcode version 7.2.1 .

When I try to build in xcode I get the errors shown in the attachment.

Attachment 19187

I have tried builing in just iPhone and iPhone - Ipad in MMF2.5 with and with out color reduction.

bitcode was turned off.

So Thanks To Jeff Vance this issue was resolved by using the clean button in the xcode sdk under the product tab also can be used by a quick command "shift command K"

Thanks Jeff YOU DA MAN!