title: Error while connecting real iOS device with Appium server
body: <p>I'm trying to open the application from Appium server and getting the below mentioned error.</p>
  
  <blockquote>
    <p>An unknown server-side error occurred while processing the command.
    Original error: Unknown device or simulator UDID:
    '046e4469d6cb14ff57e378599bd4b1d09390472b'</p>
  </blockquote>
  
  <pre><code> {
    "platformName": "iOS",
    "deviceName": "iPad",
    "automationName": "XCUITest",
    "udid": "046e4469d6cb14ff57e378599bd4b1d09390472b",
    "bundleId": "com.***",
    "platformVersion": "11.2.6",
    "app": "/Users/***/***.ipa"
  }
  </code></pre>
  
  <p>even tried with app location on my Mac machine but getting the same error.</p>
  
  <pre><code>xcode version:9.2
  
  ios version:11.2.6
  
  Mac OS version:10.13.3
  
  Appium server version:1.7.2
  </code></pre>