Appium with Java: Selenium 4.11.0 Appium 8.6.0 , Could not start a new session. Response code 400. Message: Missing command parameter: appId

[johanrosabal]

Appium with Java: Selenium 4.11.0 Appium 8.6.0 , Could not start a new session. Response code 400. Message: Missing command parameter: appId

[itkhanz]

This seems to be similar to following:-

• appium.io changing my capabilities for WinAppDriver and therefore not working
• appId supplied but not found

Try initializing driver as below and see whether it resolved the issue:-

    DesiredCapabilities capabilities = new DesiredCapabilities();
    capabilities.setCapability("app", "C:\\Windows\\System32\\notepad.exe");
    capabilities.setCapability("platformName", "Windows");
    capabilities.setCapability("deviceName", "WindowsPC");
    capabilities.setCapability("automationName", "Windows");
    
    //driver = new WindowsDriver(new URL("http://127.0.0.1:4723/"), capabilities);

    HttpCommandExecutor exec = new HttpCommandExecutor(new URL("http://127.0.0.1:4723/"));
    driver  = new WindowsDriver(exec, capabilities);

I am not sure what is the underlying root cause, but I am guessing this happens because Appium changes "app" to "appium:app" and WinAppDriver is expecting "app" as WinAppDriver is not W3C Complaint.

[lucasandre22]

Hey @johanrosabal, complementing the @itkhanz response, this error may occur when you try to run WinAppDriver with Appium java and Selenium 4.
Make sure to use the appium-windows-driver in order to make WinAppDriver compatible with Selenium 4 and consequently, W3C standards.

[johanrosabal]

GitHub - appium/java-client: Java language binding for writing Appium Tests, conforms to W3C WebDriver Protocol <https://github.com/appium/java-client?tab=readme-ov-file#compatibility-matrix> I use this link and try several versions as this information specify, So, I don't what else to do, for example for Selenium 4.22 what version of the appium library did recommend ? also i try with selenium 4.11 with 8.5.0. So, i wonder if is possible that problem is the WinAppDriver version that I am using [image: image.png] El lun, 22 jul 2024 a la(s) 3:37 p.m., Lucas Almeida ( ***@***.***) escribió:

…

Hey @johanrosabal <https://github.com/johanrosabal>, complementing the @itkhanz <https://github.com/itkhanz> response, this error may occur when you try to run WinAppDriver with Appium java and Selenium 4. Make sure to use the appium-windows-driver <https://github.com/appium/appium-windows-driver> in order to make WinAppDriver compatible with Selenium 4 and consequently, W3C standards. — Reply to this email directly, view it on GitHub <#2202 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABL77NVUIC67TRZABIAVFPLZNV3R7AVCNFSM6AAAAABLFUATVOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDENBTHA2TONRSGM> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[lucasandre22]

Take a look at the compatibility matrix of Appium Java Client and Selenium Client in Java.
For example, you can use Appium 9.2.3 and Selenium 4.21.0.
The problem is, if you are using Selenium 4 and Appium, you would need to use appium-windows-driver which is a proxy over WinAppDriver in order to support Selenium 4 commands.

[johanrosabal]

Hi Lucas, The solution works for Java ? in the link that you provided I see an example for python. Did you have some example with JAVA ? El lun, 22 jul 2024 a la(s) 3:51 p.m., Lucas Almeida ( ***@***.***) escribió:

…

Take a look at the compatibility matrix of Appium Java Client and Selenium Client in Java <https://github.com/appium/java-client?tab=readme-ov-file#compatibility-matrix> . For example, you can use Appium 9.2.3 and Selenium 4.21.0. The problem is, if you are using Selenium 4 and Appium, you would need to use appium-windows-driver <https://github.com/appium/appium-windows-driver> which is a proxy over WinAppDriver in order to support Selenium 4 commands. — Reply to this email directly, view it on GitHub <#2202 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABL77NUSPUTOUFJZ6VXFUK3ZNV5E5AVCNFSM6AAAAABLFUATVOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDENBTHA3TIMZWGU> . You are receiving this because you were mentioned.Message ID: ***@***.***>