cause you did not generate it successfully following http://appium.io/docs/en/drivers/ios-xcuitest-real-devices/
I have followed the link before and did again as well but the output is same.
I have executed the below command from terminal:
xcodebuild build-for-testing test-without-building -project /usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/node_modules/appium-webdriveragent/WebDriverAgent.xcodeproj -scheme WebDriverAgentRunner -destination id=UDID -configuration Debug IPHONEOS_DEPLOYMENT_TARGET=10.3 -xcconfig /var/folders/fp/3163zlhn3gs955d5w0bv6bjw0000gp/T/2017523-42544-14kqy0a.vkq76qolxr/appium-temp.xcconfig
Response: Build Succeeds but error. The WebDriverAgentRunner-Runner.app is not installed.
/usr/bin/codesign --force --sign 60EC731073FFF0ACAE1E3C249C1B9C7B5FEC4D90 --timestamp=none --preserve-metadata=identifier,entitlements,flags /Users/USERS/Library/Developer/Xcode/DerivedData/WebDriverAgent-aiaejbhejflmruhkhsmeebmhbaia/Build/Products/Debug-iphoneos/WebDriverAgentRunner.xctest/Frameworks/WebDriverAgentLib.framework
/Users/USERS/Library/Developer/Xcode/DerivedData/WebDriverAgent-aiaejbhejflmruhkhsmeebmhbaia/Build/Products/Debug-iphoneos/WebDriverAgentRunner.xctest/Frameworks/WebDriverAgentLib.framework: replacing existing signature
CodeSign /Users/USERS/Library/Developer/Xcode/DerivedData/WebDriverAgent-aiaejbhejflmruhkhsmeebmhbaia/Build/Products/Debug-iphoneos/WebDriverAgentRunner.xctest (in target âWebDriverAgentRunnerâ from project âWebDriverAgentâ)
cd /usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/node_modules/appium-webdriveragent
export CODESIGN_ALLOCATE=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/codesign_allocate
Signing Identity: âCertificateâ
Provisioning Profile: âProfileâ
/usr/bin/codesign --force --sign 60EC731073FFF0ACAE1E3C249C1B9C7B5FEC4D90 --entitlements /Users/USERS/Library/Developer/Xcode/DerivedData/WebDriverAgent-aiaejbhejflmruhkhsmeebmhbaia/Build/Intermediates.noindex/WebDriverAgent.build/Debug-iphoneos/WebDriverAgentRunner.build/WebDriverAgentRunner.xctest.xcent --timestamp=none /Users/USERS/Library/Developer/Xcode/DerivedData/WebDriverAgent-aiaejbhejflmruhkhsmeebmhbaia/Build/Products/Debug-iphoneos/WebDriverAgentRunner.xctest
** TEST BUILD SUCCEEDED **
xcodebuild: error: Failed to build project WebDriverAgent with scheme WebDriverAgentRunner.
Reason: Testing couldnât begin on the device âipadâ: Logic Testing Unavailable
Well i do always full manual flow mentioned above. Never tried other ways as full manual for me the easiest way. Try it instead.