Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error

Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error

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Swift Compiler Error: "Expression too complex" on a string concatenation

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Xcode 4.1 fatal error: stdlib modified since the precompiled header was built

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Xcode 8.3 libMobileGestalt MobileGestaltSupport.m:153:

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NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle

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'NSInvalidArgumentException', reason: 'Unable to parse constraint format'

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FBSOpenApplicationErrorDomain Code=3

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Failed to emit precompiled header for bridging header

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Xcode "Use of undeclared identifier" errors, compiles/runs just fine

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Xcode 8.0 Command /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1

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What does the "Couldn't compile connection:" error mean?

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ios - Parse Issues in NSObjCRuntime, NSZone, and NSObject

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xCode 6 how to fix "Use of undeclared identifier" for automatic property synthesis?

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How do I solve a 'NSUnknownKeyException' ... setValue:forUndefinedKey:]: ...not key value coding compliant [duplicate]

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The bundle's Info.plist does not contain a CFBundleVersion key or its value is not a string

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