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I added a directory with images to a perfectly working Cocoa Obj-C project. My code immediately started crashing on start with the below messages. I am not using IB whatsoever. I tried to make rename my sources directory then create a new project with the same name. It too immediately crashes on start with the same error. Please advise.

Thank you

Unknown class IDDragTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.118 BackupAssistant[33519:303] Unknown class IDWebView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.118 BackupAssistant[33519:303] Unknown class IDWebView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.127 BackupAssistant[33519:303] Unknown class LNSSourceListView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.128 BackupAssistant[33519:303] Unknown class LNSSourceListColumn in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.164 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.164 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.165 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.165 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.165 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.166 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.166 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.166 BackupAssistant[33519:303] Unknown class IDTableView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.167 BackupAssistant[33519:303] Unknown class IDWebView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.167 BackupAssistant[33519:303] Unknown class IDWebView in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.168 BackupAssistant[33519:303] Unknown class IDSMSCell in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.169 BackupAssistant[33519:303] Unknown class CircleImageCell in Interface Builder file at path /Users/shmukler/Library/Developer/Xcode/DerivedData/BackupAssistant-galyvxwzpdltaherqlqcobfokqbc/Build/Products/Debug/BackupAssistant.app/Contents/Resources/MainMenu.nib.
2014-10-09 22:20:43.174 BackupAssistant[33519:303] An uncaught exception was raised
TMob
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Moshe Shmukler
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  • Why don't you try clearing the derived data for the project? Also check these out. http://stackoverflow.com/questions/1725881/unknown-class-myclass-in-interface-builder-file-error-at-runtime and http://stackoverflow.com/questions/4591911/unknown-class-firstviewcontroller-in-interface-builder-file – Rakesh Oct 09 '14 at 20:35
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    Clearing the derived data helped. Thank you. – Moshe Shmukler Oct 09 '14 at 20:57
  • Remember to add an answer to your question if you solved it. – TMob Oct 10 '14 at 05:51

1 Answers1

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Please try to delete the Derived data content.

  1. Go to Xcode menu Windows -> Organizer. enter image description here

  2. Delete the Derived data content (Remember to Quit Xcode) enter image description here

Meet
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