CoreSimulator is attempting to unload a stale CoreSimulatorService job.

After build when AppCode attempts to launch the iOS simulator I encounter this error.  It even occurs on the latest 3.4 EAP.   I've tried uninstalling and reinstalling all the simulators but that didn't help.

/Users/chris/Library/Caches/AppCode34/DerivedData/Test-b3e7b3ca/Build/Products/Staging-iphonesimulator/Test.app
2016-02-19 13:04:25.189 simlauncher[37131:7019249] CoreSimulator is attempting to unload a stale CoreSimulatorService job. Detected Xcode.app relocation or CoreSimulatorService version change. Framework path (/Applications/XCode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework) and version (201.3) does not match existing job path (/Applications/Xcode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework/Versions/A/XPCServices/com.apple.CoreSimulator.CoreSimulatorService.xpc/Contents/MacOS/com.apple.CoreSimulator.CoreSimulatorService) and version (201.3).
2016-02-19 13:04:26.228 simlauncher[37131:7019249] Job com.apple.CoreSimulator.CoreSimulatorService exists after SMJobRemove(). This can occur if running sandboxed. jobPath: /Applications/Xcode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework/Versions/A/XPCServices/com.apple.CoreSimulator.CoreSimulatorService.xpc/Contents/MacOS/com.apple.CoreSimulator.CoreSimulatorService frameworkPath: /Applications/XCode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework
2016-02-19 13:04:26.483 simlauncher[37131:7019249] Failed to locate a valid instance of CoreSimulatorService in the bootstrap. Adding it now.
2016-02-19 13:04:26.567 simlauncher[37131:7019249] *** Assertion failure in -[SimServiceContext reloadServiceIfMovedOrAbortIfWeAreInvalid], /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreSimulator/CoreSimulator-201.3/CoreSimulator/SimServiceContext.m:452
2016-02-19 13:04:26.575 simlauncher[37131:7019249] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'The loaded com.apple.CoreSimulator.CoreSimulatorService job does not match our expectations: pathOfLoadedJob: /Applications/Xcode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework/Versions/A/XPCServices/com.apple.CoreSimulator.CoreSimulatorService.xpc/Contents/MacOS/com.apple.CoreSimulator.CoreSimulatorService, our frameworkPath: /Applications/XCode.app/Contents/Developer/Library/PrivateFrameworks/CoreSimulator.framework'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff908abae2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff901e4f7e objc_exception_throw + 48
2 CoreFoundation 0x00007fff908ab8ba +[NSException raise:format:arguments:] + 106
3 Foundation 0x00007fffa194088c -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
4 CoreSimulator 0x000000010472f3a6 -[SimServiceContext reloadServiceIfMovedOrAbortIfWeAreInvalid] + 1411
5 CoreSimulator 0x000000010472fc03 -[SimServiceContext connect] + 41
6 CoreSimulator 0x000000010472e8bc -[SimServiceContext initWithConnectionType:] + 949
7 CoreSimulator 0x000000010472e41a +[SimServiceContext simContextWithConnectionType:] + 50
8 CoreSimulator 0x000000010472e3cb __41+[SimServiceContext sharedServiceContext]_block_invoke + 32
9 libdispatch.dylib 0x00007fff96a0433f _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff96a04237 dispatch_once_f + 67
11 CoreSimulator 0x000000010472e3a9 +[SimServiceContext sharedServiceContext] + 46
12 CoreSimulator 0x000000010476295e +[SimRuntime supportedRuntimes] + 31
13 DVTiPhoneSimulatorRemoteClient 0x0000000104033092 -[DTiPhoneSimulatorSessionConfig init] + 76
14 simlauncher 0x000000010401e5a0 -[Launcher createConfig] + 37
15 simlauncher 0x000000010401e337 -[Launcher launch] + 182
16 Foundation 0x00007fffa1a55c6f __NSThread__start__ + 1351
17 libsystem_pthread.dylib 0x00007fff9b321c13 _pthread_body + 131
18 libsystem_pthread.dylib 0x00007fff9b321b90 _pthread_body + 0
19 libsystem_pthread.dylib 0x00007fff9b31f375 thread_start + 13
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Process finished with exit code 134