title: xcodebuild Interface Builder error, Failure Reason: Timed out waiting for FIFOs to open
body: <p>I am getting an error when building with xcodebuild on Xcode 7.1/El Capitan</p>
  
  <p>Restarting has not helped .</p>
  
  <pre><code>xcodebuild -workspace CL.xcworkspace -scheme CL -configuration Release
  
  
  2015-11-12 11:55:49.889 ibtoold[5348:95303] [MT] DVTAssertions: 
  
  Warning in
  /Library/Caches/com.apple.xbs/Sources/IDEInterfaceBuilder/IDEInterfaceBuilder-9059/InterfaceBuilderKit/Utilities/IBAbstractInterfaceBuilderPlatformToolManager.m:253
  
  Details:  Failed to attach to Interface Builder Cocoa Touch Tool with error:
  Error Domain=com.apple.InterfaceBuilder Code=-1 "Encountered an error
  communicating with Interface Builder Cocoa Touch Tool."
  UserInfo={NSUnderlyingError=0x7fda54ba7cc0 {Error
  Domain=com.apple.InterfaceBuilder Code=-1 "Failed to launch Interface Builder
  Cocoa Touch Tool via CoreSimulator spawn"
  UserInfo={NSLocalizedDescription=Failed to launch Interface Builder Cocoa Touch
  Tool via CoreSimulator spawn, NSUnderlyingError=0x7fda54b36cf0 {Error
  Domain=com.apple.InterfaceBuilder Code=-1 "Failed to handshake with platform
  tool" UserInfo={NSUnderlyingError=0x7fda5510fed0 {Error
  Domain=com.apple.InterfaceBuilder Code=-1 "" UserInfo=0x7fda550f1ad0 (not
  displayed)}, NSLocalizedFailureReason=Failed to open connection over FIFOs with
  platform tool, NSLocalizedDescription=Failed to handshake with platform
  tool}}}}, NSLocalizedDescription=Encountered an error communicating with
  Interface Builder Cocoa Touch Tool., NSLocalizedRecoverySuggestion=Please check
  Console.app for crash reports for "Interface Builder Cocoa Touch Tool" for
  further information., NSLocalizedFailureReason=Interface Builder Cocoa Touch
  Tool (5353) failed to launch}
  
  Object:   
  
  Method:
  +_THREADSAFE_launchNewToolWithLaunchContext:executionContext:toolProxyClass:failureContext:requestingMethod:error:forReason:
  
  Thread:   {number = 1, name = main}
  
  Please file a bug at http://bugreport.apple.com with this warning message and
  any useful information you can provide.
  
  2015-11-12 11:55:49.894 ibtoold[5348:95303] [MT] IBPlatformTool: *** Failed to
  launch tool with description  System content 1x for
  IBCocoaTouchFramework-NineOneAndLater w/ default fidelity: Encountered an error
  communicating with Interface Builder Cocoa Touch Tool. (Failure reason:
  Interface Builder Cocoa Touch Tool (5353) failed to launch): Failed to launch
  Interface Builder Cocoa Touch Tool via CoreSimulator spawn: Failed to handshake
  with platform tool (Failure reason: Failed to open connection over FIFOs with
  platform tool): : Failed to open FIFOs for handshaking with platform tool
  (Failure reason: Timed out waiting for FIFOs to open. Most likely Interface
  Builder Cocoa Touch Tool crashed before it could open the other end.)
  
  2015-11-12 11:56:01.366 ibtoold[5348:95303] [MT] IBPlatformTool: Wrote failed
  marshalling request diagnostics to path:
  /var/folders/57/r6trfqkx7m11pm6r1d276tbw0000gn/T/IB-agent-diagnostics_2015-11-12_11-55-58_390000
  
  /* com.apple.ibtool.errors */
  
  /
  /build/builds/CH_IOS_ChromeLync/AnyLync_Project/ConnectedHome/iOSClient/branches/ChromeLyncNew/CLLaunch
  /Screen.xib: error: Internal error. Please file a bug at bugreport.apple.com and
  /attach
  /"/var/folders/57/r6trfqkx7m11pm6r1d276tbw0000gn/T/IB-agent-diagnostics_2015-11-12_11-55-58_390000".
  
      Recovery Suggestion: Please check Console.app for crash reports for
      "Interface Builder Cocoa Touch Tool" for further information.
  
      Underlying Errors:
  
          Description: Encountered an error communicating with Interface Builder
          Cocoa Touch Tool.
  
          Failure Reason: Interface Builder Cocoa Touch Tool (5353) failed to
          launch
  
          Recovery Suggestion: Please check Console.app for crash reports for
          "Interface Builder Cocoa Touch Tool" for further information.
  
          Underlying Errors:
  
              Description: Failed to launch Interface Builder Cocoa Touch Tool via
              CoreSimulator spawn
  
              Underlying Errors:
  
                  Description: Failed to handshake with platform tool
  
                  Failure Reason: Failed to open connection over FIFOs with
                  platform tool
  
                  Underlying Errors:
  
                      Description:
  
                      Recovery Suggestion: Try restarting your computer
  
                      Underlying Errors:
  
                          Description: Failed to open FIFOs for handshaking with
                          platform tool
  
                          Failure Reason: Timed out waiting for FIFOs to open.
                          Most likely Interface Builder Cocoa Touch Tool crashed
                          before it could open the other end.
  </code></pre>