Build Error while debugging iphone project
<p>Help! i have got a unknown error while i build my project in stimulator,i have copy some class files from another project to my current project.I tried a loat to fix this but no luck.I checked all the framework ,in some case missing framework cause this type of error ,but in my case there is nothing about framework.my error is attached here.Please help me.
Thanks in advance.</p>

<pre><code>Build BibleIphone of project BibleIphone with configuration Debug

Ld build/Debug-iphonesimulator/BibleIphone.app/BibleIphone normal i386
cd "/Users/admin/Desktop/11:2011"
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk -L/Users/admin/Desktop/11:2011/build/Debug-iphonesimulator -F/Users/admin/Desktop/11:2011/build/Debug-iphonesimulator -F/Users/admin/Desktop/11:2011 -filelist /Users/admin/Desktop/11:2011/build/BibleIphone.build/Debug-iphonesimulator/BibleIphone.build/Objects-normal/i386/BibleIphone.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -framework CoreGraphics -framework OpenGLES -framework QuartzCore -framework SystemConfiguration -framework MessageUI -framework CoreText -lsqlite3 -framework UIKit -framework Foundation -o /Users/admin/Desktop/11:2011/build/Debug-iphonesimulator/BibleIphone.app/BibleIphone

Undefined symbols:
  "_OBJC_CLASS_$_BookSelectionview", referenced from:
      objc-class-ref-to-BookSelectionview in BibleIphoneAppDelegate.o
  "_OBJC_CLASS_$_ReadViewController", referenced from:
      objc-class-ref-to-ReadViewController in BibleIphoneAppDelegate.o
  "_OBJC_CLASS_$_Malayalam_BibleAppDelegate", referenced from:
      objc-class-ref-to-Malayalam_BibleAppDelegate in BibleIphoneAppDelegate.o
  "_OBJC_CLASS_$_SearchViewController", referenced from:
      objc-class-ref-to-SearchViewController in BibleIphoneAppDelegate.o
  "_OBJC_CLASS_$_ParallelReadViewController", referenced from:
      objc-class-ref-to-ParallelReadViewController in BibleIphoneAppDelegate.o
  "_OBJC_CLASS_$_MoreViewController", referenced from:
      objc-class-ref-to-MoreViewController in BibleIphoneAppDelegate.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
</code></pre>
