iPhone - Build Error Target is 3.1.2 but can not find NSPredicate
<p>I'm still pretty new at iPhone development and I'm running into this odd build error which I do not understand.  I'm trying to build and run my iPhone application and XCode is telling me that it can not find NSPredicate.  To my understanding it was made available in iPhone SDK 3.0 and I'm trying to build for 3.1.  I set the target to being "Simulator - 3.1.2 | Debug" in the top left selection box and then hit "Build and Go".  I tried setting it in the target app's info as well.</p>

<p>If anyone can direct me to where/what I can change or any documentation, I would appreciate it.</p>

<p>Thanks.</p>
