Mach - O Linker errors in Xcode 4.5.2

Questions & Answers
1

I have a Unity/iOS project that has build to the device fine in the past. The project uses Vuforia, the Etcetera plugin, and NGUI, along with a couple of my own plugins. Yesterday I started working on another version of the project after not touching the project for about 3 month. Now when I try to build to the iPad 2 I get this error:

Undefined symbols for architecture armv7:
“_URLRequestErrorCheckpoint”, referenced from:
RegisterMonoModules() in RegisterMonoModules.o

I have tried updating Unity. Also checked for updates to the plugins. I’ve tried building for armv7 only, no armv7s, no luck. It seems to be a Unity issue since the error is referencing RegisterMonoModules. I have all the libraries I need, set for the correct target. I can run the old iOS build of the original project, but if I open up the original Unity project and make a new iOS build, I get the same error. The only updates that I have done are Xcode 4.5.2 and Mountain Lion. Any ideas? Thanks

2

This turned out to be caused by a Test Flight method call that was in my C# script. I overlooked it, partly because of the reference to a URL request. I removed the line of code and all was well. Lesson learned: look for the simple solutions first.