I get this error when I try to run unit tests (yes, it says "UI testing", but I don't have any UI tests). On both simulator and device, whether I run/build the app before or not. How do I solve this?
Failed to prevent system sleep during UI testing. Error code: -536870211
Any hints what can be done when this happens?
It happens now for me with Xcode 13...
-536870211 translates to 0xe00002bd which is kIOReturnNoMemory, which is not what I was expecting )-:
I presume that, like yanfromvancouver, you’re hitting this on a unit test. If so, does the problem reproduce if you create a new dummy project from one of the built-in templates?
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Thank you, Quinn for the quick answer!
Sorry, I didn't update this thread, but restarting everything helped. It seems to be some kind of illegal/strange state.
This is still happening for me with latest Xcode beta on Ventura. It's bloody annoying when it starts happening. It's even continuing after a reboot!
I've filed a Feedback on it, if that helps: FB11344760 with this info
Details
Failed to prevent system sleep during UI testing. Error code: -536870211
Domain: IDEFoundationErrorDomain
Code: 1
User Info: {
DVTErrorCreationDateKey = "2022-08-22 22:52:06 +0000";
}
--
System Information macOS Version 13.0 (Build 22A5321d) Xcode 14.0 (21322) (Build 14A5284g) Timestamp: 2022-08-22T17:52:06-05:00