Error "Expected in: flat namespace" when building

[dagio]

I have the following errors when building :

[15:33:58]: ▸ 2016-08-30 15:33:58.454 xcodebuild[52822:8611461] WARNING: Failed to load plugin at path: "/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin", skipping. Error: Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, 265): Symbol not found: _OBJC_CLASS_$_IDEWorkspaceWindow
[15:33:58]: ▸ Referenced from: /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin
[15:33:58]: ▸ Expected in: flat namespace
[15:33:58]: ▸ in /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin" UserInfo={NSLocalizedFailureReason=The bundle couldn’t be loaded., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSFilePath=/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, NSDebugDescription=dlopen(/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, 265): Symbol not found: _OBJC_CLASS_$_IDEWorkspaceWindow
[15:33:58]: ▸ Referenced from: /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin
[15:33:58]: ▸ Expected in: flat namespace
[15:33:58]: ▸ in /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, NSBundlePath=/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin, NSLocalizedDescription=The bundle “OneSkyPlugin” couldn’t be loaded.}

There are no problems with the other addons

[bretdabaker]

Xcode 7's plugins are loaded at launch so it shouldn't affect your building process. Can you please provide more information?

• Which version of Xcode did you use?
• Did you use CLI or Xcode to build?

[dagio]

The problem is in CLI yes.

❯ xcodebuild -workspace Livescore.xcworkspace -scheme WhatsTheScore -destination 'platform=iOS Simulator,name=iPhone 6s,OS=9.3' build
2016-09-15 10:26:48.574 xcodebuild[32630:420577] [MT] PluginLoading: Required plug-in compatibility UUID ACA8656B-FEA8-4B6D-8E4A-93F4C95C362C for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/FuzzyAutocomplete.xcplugin' not present in DVTPlugInCompatibilityUUIDs
2016-09-15 10:26:48.806 xcodebuild[32630:420577] WARNING: Failed to load plugin at path: "/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin", skipping. Error: Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, 265): Symbol not found: _OBJC_CLASS_$_IDEWorkspaceWindow
  Referenced from: /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin
  Expected in: flat namespace
 in /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin" UserInfo={NSLocalizedFailureReason=The bundle couldn’t be loaded., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSFilePath=/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, NSDebugDescription=dlopen(/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, 265): Symbol not found: _OBJC_CLASS_$_IDEWorkspaceWindow
  Referenced from: /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin
  Expected in: flat namespace
 in /Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin/Contents/MacOS/OneSkyPlugin, NSBundlePath=/Users/damiengavard/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OneSkyPlugin.xcplugin, NSLocalizedDescription=The bundle “OneSkyPlugin” couldn’t be loaded.}
=== BUILD TARGET BNRDeferred OF PROJECT Pods WITH CONFIGURATION Debug ===

[bretdabaker]

The warning - along with other plugin warnings - doesn't affect the build process and can be safely ignored.