Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Error raised when launching the app: Specify either app or appTopLevelWindow to create a session

See original GitHub issue

I am trying to launch my test with the following capabilities:

{
  "capabilities": {
    "firstMatch": [
      {
        
      }
    ],
    "alwaysMatch": {
      "appium:app": "C:\\AeroScoutEngineManager\\bin\\Rte\\EngineManager.exe",
      "appium:winAppDriverHost": "127.0.0.1:4723",
      "platformName": "Windows",
      "appium:platformVersion": "10",
      "appium:automationName": "Windows",
      "appium:appArguments": "ShellLayout.xml ShellCnf.xml",
      "appium:appWorkingDir": "c:\\AeroScoutEngineManager\\bin\\Rte"
    }
  }
}

My application must be launched with the arguments above. from that specific path.

The error I am getting is:

Windows Application Driver listening for requests at: http://127.0.0.1:4723/
Press ENTER to exit.


==========================================
POST /session HTTP/1.1

Accept: application/json

Accept-Encoding: identity

Connection: keep-alive

Content-Length: 387

Content-Type: application/json;charset=UTF-8

Host: 127.0.0.1:4723

User-Agent: appium/python 2.6.0 (selenium/4.3.0 (python windows))

X-Idempotency-Key: 4479771e-d340-492a-9486-c96fe20d15c2



{"capabilities": {"firstMatch": [{}], "alwaysMatch": {"appium:app": "C:\\AeroScoutEngineManager\\bin\\Rte\\EngineManager.exe", "appium:winAppDriverHost": "127.0.0.1:4723", "platformName": "Windows", "appium:platformVersion": "10", "appium:automationName": "Windows", "appium:appArguments": "ShellLayout.xml ShellCnf.xml", "appium:appWorkingDir": "c:\\AeroScoutEngineManager\\bin\\Rte"}}}
HTTP/1.1 400 Bad Request

Content-Length: 141

Content-Type: application/json



{"status":100,"value":{"error":"invalid argument","message":"Bad capabilities. Specify either app or appTopLevelWindow to create a session"}}


==========================================
POST /session HTTP/1.1

Accept: application/json

Accept-Encoding: identity

Connection: keep-alive

Content-Length: 387

Content-Type: application/json;charset=UTF-8

Host: 127.0.0.1:4723

User-Agent: appium/python 2.6.0 (selenium/4.3.0 (python windows))

X-Idempotency-Key: e71805eb-5c48-40b8-8a38-c45b801d244d



{"capabilities": {"firstMatch": [{}], "alwaysMatch": {"appium:app": "C:\\AeroScoutEngineManager\\bin\\Rte\\EngineManager.exe", "appium:winAppDriverHost": "127.0.0.1:4723", "platformName": "Windows", "appium:platformVersion": "10", "appium:automationName": "Windows", "appium:appArguments": "ShellLayout.xml ShellCnf.xml", "appium:appWorkingDir": "c:\\AeroScoutEngineManager\\bin\\Rte"}}}
HTTP/1.1 400 Bad Request

Content-Length: 141

Content-Type: application/json



{"status":100,"value":{"error":"invalid argument","message":"Bad capabilities. Specify either app or appTopLevelWindow to create a session"}}
==========================================

What is the problem?

Thanks!

Issue Analytics

State:
Created a year ago
Comments:24

Top GitHub Comments

2reactions

bwomsm1commented, Sep 28, 2022

@Shilpiiiii what are your python versions of Appium-Python-Client and selenium? from my experience with that error you need to downgrade these libs versions

2reactions

bwomsm1commented, Aug 15, 2022

Problem was related to Appium-Python-Client lib version, I had to downgrade from 2.6.0 to 2.2.0 and the issue solved. In addition to downgrade Selenium version 3.141.1

(Thanks @anunay1)