Facing issue while running appium grid on multiple iOS devices. Getting "iproxy exited with code '208'"

I am trying to execute scripts on multiple iOS devices. I have registered nodes to Selenium Grid successfully and its up now. But scripts are running only in one devices. For another device i am getting below error.

Output from xcodebuild will not be logged
[debug] [XCUITest] Starting iproxy to forward traffic from local port 8100 to device port 8100 over USB
[debug] [XCUITest] iproxy exited with code ‘208’
[debug] [BaseDriver] Event ‘wdaStartFailed’ logged at 1503063165426 (19:02:45 GMT+0530 (IST))
[debug] [XCUITest] Unable to launch WebDriverAgent because of xcodebuild failure: iproxy exited with code ‘208’
[debug] [XCUITest] Quitting and uninstalling WebDriverAgent, then retrying
[XCUITest] Shutting down sub-processes
[debug] [XCUITest] Removing WDA application from device
[debug] [XCUITest] Error : Command ‘ios-deploy --uninstall_only --id b2091516106b80389fde0ba53b054a8376ac2482 --bundle_id com.apple.test.WebDriverAgentRunner-Runner’ exited with code 253
[XCUITest] Error: Could not remove app: ‘Command ‘ios-deploy --uninstall_only --id b2091516106b80389fde0ba53b054a8376ac2482 --bundle_id com.apple.test.WebDriverAgentRunner-Runner’ exited with code 253’
at IOSDeploy.remove$ (…/…/lib/ios-deploy.js:25:13)
at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:315:22)
at GeneratorFunctionPrototype.prototype.(anonymous function) [as throw] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:100:21)
at GeneratorFunctionPrototype.invoke (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
at
at process._tickCallback (internal/process/next_tick.js:188:7)
Error: Could not remove app: ‘Command ‘ios-deploy --uninstall_only --id b2091516106b80389fde0ba53b054a8376ac2482 --bundle_id com.apple.test.WebDriverAgentRunner-Runner’ exited with code 253’
at IOSDeploy.remove$ (…/…/lib/ios-deploy.js:25:13)
at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:315:22)
at GeneratorFunctionPrototype.prototype.(anonymous function) [as throw] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:100:21)
at GeneratorFunctionPrototype.invoke (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
at
at process._tickCallback (internal/process/next_tick.js:188:7)
[debug] [XCUITest] Not clearing log files. Use clearSystemFiles capability to turn on.
[debug] [iOSLog] Stopping iOS log capture
[MJSONWP] Encountered internal error running command: Error: Could not remove app: ‘Command ‘ios-deploy --uninstall_only --id b2091516106b80389fde0ba53b054a8376ac2482 --bundle_id com.apple.test.WebDriverAgentRunner-Runner’ exited with code 253’
at IOSDeploy.remove$ (…/…/lib/ios-deploy.js:25:13)
at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)

Issue has been resolved after adding different port number for “wdaLocalPort” as capability for different devices.

Below link helped me.