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Error: Command failed: *adb.exe -s emulator-5554 shell “ps ‘uiautomator'””

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Especially when working with Appium (1.4.16), Android Studio (2.2.3 and above) and with Android N (7.0) version, execution of test automation script encounters the below error:

Error: Command failed: C:\Windows\system32\cmd.exe /s /c “C:\Users\{user}\AppData\Local\Android\sdk\platform-tools\adb.exe -s emulator-5554 shell “ps ‘uiautomator'””

Error you see in Appium server:

Error in Android studio run console:

Solution for this error is to append and replace the code in adb.js file present at location

C:\Program Files (x86)\Appium\node_modules\appium\node_modules\appium-adb\lib

Code changes to be done goes as below:

  1. Go to adb.js in the path ‘node_modules//appium/node_modules/appium-adb/lib/adb.js’
    ***Find the below**

    Append the below
  2. Find the ‘ADB.prototype.getPIDsByName ‘ and replace the whole section

Performing above changes you are good to go ahead, for more detail you can refer to the actual discussion at appium support website

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