tvOS CI failure: The specified device was not found.

[svick]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1431345
Build error leg or test failing: System.Runtime.Tests.WorkItemExecution
Pull request: #125410

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

[09:26:18] info: Preparing run for tvos-device
[09:26:18] info: Looking for available tvos-device devices..
[09:26:18] dbug: Looking for available tvos-device devices. Storing logs into list-tvos-device-20260526_092618.log
[09:26:24] info: Found physical device 'DNCENGTVOS-085'
[09:26:24] info: Getting app bundle information from '/tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app'..
[09:26:24] info: Uninstalling any previous instance of 'net.dot.System.Runtime.Tests' from 'DNCENGTVOS-085'
[09:26:24] dbug: 
[09:26:24] dbug: Running /private/tmp/helix/working/A480094D/p/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26230.4/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
[09:26:25] dbug: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmpb08AyQ.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests
[09:26:25] dbug: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[09:26:25] dbug: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))
[09:26:25] dbug: error HE1045: Failed to execute 'devicectl': 'devicectl -j /tmp/helix/working/A480094D/t/tmpb08AyQ.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests' returned the exit code 1.
[09:26:25] dbug: error HE1046: Additional output: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmpb08AyQ.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests
[09:26:25] dbug: error HE1046: Additional output: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[09:26:25] dbug: error HE1046: Additional output: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))
[09:26:25] dbug: Process mlaunch exited with 1
[09:26:25] dbug: Preemptive uninstallation of application failed
[09:26:25] info: Installing application 'System.Runtime.Tests' on 'DNCENGTVOS-085'
[09:26:25] dbug: Installing '/tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app' to 'DNCENGTVOS-085' (133.79 MB)
[09:26:25] dbug: 
[09:26:25] dbug: Running /private/tmp/helix/working/A480094D/p/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26230.4/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
[09:26:26] dbug: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmpwTs3Y4.tmp device install app --device a5fe6888ba0dac5637736381d7358a56963ef68e /tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app
[09:26:26] dbug: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[09:26:26] dbug: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))
[09:26:27] dbug: error MT1006: Could not install the application '/tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app' on the device 'a5fe6888ba0dac5637736381d7358a56963ef68e': One or more errors occurred. (Failed to execute 'devicectl': 'devicectl -j /tmp/helix/working/A480094D/t/tmpwTs3Y4.tmp device install app --device a5fe6888ba0dac5637736381d7358a56963ef68e /tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app' returned the exit code 1.) (Additional output: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmpwTs3Y4.tmp device install app --device a5fe6888ba0dac5637736381d7358a56963ef68e /tmp/helix/working/A480094D/w/AD840911/e/System.Runtime.Tests.app) (Additional output: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.) (Additional output: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))).
[09:26:27] dbug: 
[09:26:27] dbug: Process mlaunch exited with 1
[09:26:27] fail: Failed to install the application
[09:26:27] info: Cleaning up the failed installation from 'DNCENGTVOS-085'
[09:26:27] info: Uninstalling the application 'net.dot.System.Runtime.Tests' from 'DNCENGTVOS-085'
[09:26:27] dbug: 
[09:26:27] dbug: Running /private/tmp/helix/working/A480094D/p/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26230.4/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
[09:26:27] dbug: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmp6bHXXv.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests
[09:26:27] dbug: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[09:26:27] dbug: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))
[09:26:28] dbug: error HE1045: Failed to execute 'devicectl': 'devicectl -j /tmp/helix/working/A480094D/t/tmp6bHXXv.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests' returned the exit code 1.
[09:26:28] dbug: error HE1046: Additional output: xcrun devicectl -j /tmp/helix/working/A480094D/t/tmp6bHXXv.tmp device uninstall app --device DNCENGTVOS-085 net.dot.System.Runtime.Tests
[09:26:28] dbug: error HE1046: Additional output: Running devicectl with elevated privileges via sudo is unlikely to work properly. Please do not do this.
[09:26:28] dbug: error HE1046: Additional output: ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))
[09:26:28] dbug: Process mlaunch exited with 1
[09:26:28] fail: Failed to uninstall the app bundle! Check logs for more details!

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1431345
Error message validated: [ERROR: The specified device was not found. (com.apple.dt.CoreDeviceError error 1000 (0x3E8))]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/26/2026 4:26:08 PM UTC

Report

Build	Repository	Test	Pull Request
1524472	dotnet/runtime	Invariant.Tests.WorkItemExecution
1523965	dotnet/runtime	System.Net.Ping.Functional.Tests.WorkItemExecution
1523812	dotnet/runtime	Regression_ro_2.WorkItemExecution	#131115
1522836	dotnet/runtime	Microsoft.Extensions.Configuration.Xml.Tests.WorkItemExecution
1521470	dotnet/runtime	System.Console.Tests.WorkItemExecution
1521339	dotnet/runtime	System.Security.Claims.Tests.WorkItemExecution	#130622
1521102	dotnet/runtime	System.Data.DataSetExtensions.Tests.WorkItemExecution
1521355	dotnet/runtime	System.Globalization.Tests.WorkItemExecution
1520933	dotnet/runtime	System.Diagnostics.TraceSource.Tests.WorkItemExecution
1520441	dotnet/runtime	System.Xml.Linq.Streaming.Tests.WorkItemExecution	#130159
1520451	dotnet/runtime	Microsoft.Extensions.Http.Tests.WorkItemExecution
1519700	dotnet/runtime	Microsoft.Bcl.AsyncInterfaces.Tests.WorkItemExecution
1519953	dotnet/runtime	System.Composition.Runtime.Tests.WorkItemExecution
1519822	dotnet/runtime	System.CodeDom.Tests.WorkItemExecution
1519657	dotnet/runtime	iOS.CoreCLR.Interpreter.Test.WorkItemExecution	#130622
1519091	dotnet/runtime	System.Memory.Data.Tests.WorkItemExecution
1518979	dotnet/runtime	System.ComponentModel.TypeConverter.Tests.WorkItemExecution
1518559	dotnet/runtime	System.Diagnostics.Tools.Tests.WorkItemExecution
1518068	dotnet/runtime	Methodical_do.WorkItemExecution	#130622
1517726	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#131077
1514233	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#130854
1516926	dotnet/runtime	Microsoft.Extensions.Hosting.Systemd.Tests.WorkItemExecution
1515623	dotnet/runtime	System.Console.Manual.Tests.WorkItemExecution
1515046	dotnet/runtime	Regression_PdbOnly_r_2.WorkItemExecution	#130622
1515072	dotnet/runtime	System.Composition.Hosting.Tests.WorkItemExecution
1515081	dotnet/runtime	System.Buffers.Tests.WorkItemExecution
1514458	dotnet/runtime	Microsoft.Extensions.FileProviders.Composite.Tests.WorkItemExecution
1512245	dotnet/runtime	System.Diagnostics.Debug.Tests.WorkItemExecution
1511237	dotnet/runtime	Microsoft.Extensions.Diagnostics.Tests.WorkItemExecution
1510254	dotnet/runtime	System.Composition.AttributeModel.Tests.WorkItemExecution
1507089	dotnet/runtime	Microsoft.Bcl.TimeProvider.Tests.WorkItemExecution
1509697	dotnet/runtime	threading_group2.WorkItemExecution	#130159
1508982	dotnet/runtime	System.Diagnostics.FileVersionInfo.Tests.WorkItemExecution
1508374	dotnet/runtime	System.Diagnostics.TraceSource.Config.Tests.WorkItemExecution
1507181	dotnet/runtime	System.Composition.AttributeModel.Tests.WorkItemExecution
1499665	dotnet/runtime	System.ComponentModel.Tests.WorkItemExecution
1505374	dotnet/runtime	JIT_r.WorkItemExecution
1505016	dotnet/runtime	System.CodeDom.Tests.WorkItemExecution
1503537	dotnet/runtime	System.Globalization.Extensions.iOS.Tests.WorkItemExecution	#130469
1503536	dotnet/runtime	System.Net.Mail.Unit.Tests.WorkItemExecution	#130468
1502636	dotnet/runtime	Microsoft.Extensions.Configuration.FileExtensions.Tests.WorkItemExecution
1502635	dotnet/runtime	Microsoft.Extensions.Diagnostics.Abstractions.Tests.WorkItemExecution
1502303	dotnet/runtime	Microsoft.Extensions.Configuration.Ini.Tests.WorkItemExecution
1501158	dotnet/runtime	Microsoft.Win32.Primitives.Tests.WorkItemExecution	#130402
1501202	dotnet/runtime	System.ComponentModel.Annotations.Tests.WorkItemExecution
1500996	dotnet/runtime	Microsoft.Extensions.Configuration.CommandLine.Tests.WorkItemExecution	#130168
1500901	dotnet/runtime	Microsoft.Extensions.DependencyModel.Tests.WorkItemExecution	#130328
1500658	dotnet/runtime	MetricOuterLoop.Tests.WorkItemExecution
1500276	dotnet/runtime	System.IO.Hashing.Tests.WorkItemExecution	#130269
1500024	dotnet/runtime	System.Diagnostics.TextWriterTraceListener.Tests.WorkItemExecution
1500022	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1499654	dotnet/runtime	System.IO.Hashing.Tests.WorkItemExecution	#130328
1499030	dotnet/runtime	System.Globalization.CalendarsWithConfigSwitch.Tests.WorkItemExecution
1499027	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1498414	dotnet/runtime	System.Numerics.Tensors.Tests.WorkItemExecution
1498243	dotnet/runtime	Microsoft.Extensions.Primitives.Tests.WorkItemExecution	#130269
1497883	dotnet/runtime	baseservices-exceptions.WorkItemExecution	#130168
1496784	dotnet/runtime	System.Runtime.InteropServices.RuntimeInformation.Tests.WorkItemExecution	#130292
1496783	dotnet/runtime	System.Net.Primitives.Functional.Tests.WorkItemExecution	#130168
1496347	dotnet/runtime	System.Reflection.Metadata.Tests.WorkItemExecution
1496266	dotnet/runtime	System.Configuration.ConfigurationManager.Tests.WorkItemExecution
1495952	dotnet/runtime	System.Drawing.Primitives.Tests.WorkItemExecution
1495180	dotnet/runtime	System.Diagnostics.Debug.Tests.WorkItemExecution
1495192	dotnet/runtime	System.Formats.Tar.Manual.Tests.WorkItemExecution
1494859	dotnet/runtime	Microsoft.Extensions.Hosting.Systemd.Tests.WorkItemExecution	#130232
1494829	dotnet/runtime	System.Net.Mail.Unit.Tests.WorkItemExecution
1493986	dotnet/runtime	System.Net.Security.Unit.Tests.WorkItemExecution
1493092	dotnet/runtime	System.Runtime.Caching.Tests.WorkItemExecution	#129845
1492827	dotnet/runtime	System.Globalization.Calendars.Tests.WorkItemExecution
1492735	dotnet/runtime	System.Net.ServicePoint.Tests.WorkItemExecution	#130061
1492684	dotnet/runtime	System.Xml.Linq.Misc.Tests.WorkItemExecution
1492589	dotnet/runtime	System.Net.Primitives.Functional.Tests.WorkItemExecution
1491753	dotnet/runtime	System.Runtime.Serialization.Xml.Canonicalization.Tests.WorkItemExecution	#130116
1491027	dotnet/runtime	baseservices.WorkItemExecution
1489740	dotnet/runtime	System.IO.FileSystem.Manual.Tests.WorkItemExecution	#130077
1489351	dotnet/runtime	Microsoft.Extensions.Configuration.FileExtensions.Tests.WorkItemExecution	#129979
1489109	dotnet/runtime	System.Collections.Tests.WorkItemExecution
1487856	dotnet/runtime	System.Globalization.Tests.WorkItemExecution	#125437
1487904	dotnet/runtime	System.Memory.Tests.WorkItemExecution	#130034
1487571	dotnet/runtime	System.Threading.Tasks.Tests.WorkItemExecution
1487037	dotnet/runtime	readytorun.WorkItemExecution
1486312	dotnet/runtime	System.Collections.Specialized.Tests.WorkItemExecution
1486105	dotnet/runtime	System.Threading.Tasks.Tests.WorkItemExecution	#129979
1486238	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#129441
1485789	dotnet/runtime	System.Diagnostics.FileVersionInfo.Tests.WorkItemExecution
1485187	dotnet/runtime	System.Globalization.Extensions.Tests.WorkItemExecution
1485131	dotnet/runtime	JIT.CodeGenBringUpTests_do.WorkItemExecution
1484402	dotnet/runtime	System.Numerics.Tensors.Tests.WorkItemExecution
1484071	dotnet/runtime	System.Xml.Linq.Axes.Tests.WorkItemExecution
1483966	dotnet/runtime	System.Collections.NonGeneric.Tests.WorkItemExecution
1483740	dotnet/runtime	System.Formats.Asn1.Tests.WorkItemExecution
1482372	dotnet/runtime	System.Diagnostics.FileVersionInfo.Tests.WorkItemExecution
1482396	dotnet/runtime	GC-scenarios1.WorkItemExecution
1481946	dotnet/runtime	System.Runtime.Loader.DefaultContext.Tests.WorkItemExecution
1480312	dotnet/runtime	System.IO.Compression.ZipFile.Tests.WorkItemExecution
1480565	dotnet/runtime	System.Resources.Writer.Tests.WorkItemExecution
1480576	dotnet/runtime	System.Globalization.Extensions.Tests.WorkItemExecution
1480439	dotnet/runtime	CoreMangLib.WorkItemExecution
1480311	dotnet/runtime	System.Security.Cryptography.Pkcs.Tests.WorkItemExecution	#129762
1480194	dotnet/runtime	System.Runtime.Serialization.Xml.Tests.WorkItemExecution	#129702
Displaying 100 of 101 results

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	25	101

[dotnet-policy-service]

Tagging subscribers to this area: @akoeplinger, @matouskozak, @simonrozsival
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

Tagging subscribers to 'os-tvos': @vitek-karas, @kotlarmilos, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[kotlarmilos]

This is infrastructure error, I created an ICM ticket.

[vitek-karas]

Fixed the title - this is happening across all branches.