Proble: failed to start an Appium session, err was : ERROR Instruments crashed on startup

Dear All,

I’m beginner in using Appium and iOS application.
The capabilities used in my code are :
DesiredCapabilities capabilities = new DesiredCapabilities();

	  capabilities.setCapability("automationName", "Appium");
	  //capabilities.setCapability("browserName", "IOS");
	  capabilities.setCapability("autoAcceptAlerts", true);


I have problems when i try to test an application installed in iPad (iOS 8) connected with a Mac like:
A new session could not be created. (original error: Instruments crashed on startup) (WARNING: The server did not provide any stacktrace information) in Eclipse.

The message error on Appium is:
could not create service named
lockdown_receive_message error!
cannot clear device state

Error: failed to start an Appium session, err was: instruments crashed on startup.

I try to clean all log files in xcode -> window -> device. I try to disconnect my device and reconnect it.I verify that device-> Developer -> Enable UI automation.

I make sure that Full Reset "unchecked.

But i didn’t succeed to resolve this problem.

I’m using an ipa not built locally but sent by the dev team.

Could you help me please.

Thank you!

Best regards,

Just install you app from xcode in your device with developer signature then run your appium script on same device, hope it will work…