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Planned

HelloWindow occasionally blocks CI builds when running Unity in batchmode

Ramon Janousch 6 days ago in realvirtual.io Starter and Professional • updated by Support 1 day ago • 3

Hi,

when we trigger our build pipeline and run tests or build the project via script, from time to time the HelloWindow pops up and blocks the pipeline run.

Context

  • We are using realvirtual in a Unity project that we build and test via Azure DevOps.

  • Unity is started from the pipeline in batchmode (no user interaction, headless build).

  • Typical commands are like: -batchmode -projectPath <path> -runTests or -batchmode -projectPath <path> -buildWindows64Player <path> ...

Most of the time this works fine, but occasionally the HelloWindow appears during startup and seems to wait for user interaction. Since this happens on a build server without UI interaction, the process just hangs and the entire CI job times out.

Expected behavior

  • When Unity is running in batchmode (CI environment), realvirtual should not open the HelloWindow at all, or

  • There should be an option (e.g. a setting, scripting define symbol, or asset menu option) to completely disable the HelloWindow for automated builds/tests.

Actual behavior

  • Infrequently, the HelloWindow still appears during CI runs, even though Unity is started in batchmode.

  • This blocks the build/test pipeline until it times out.

Questions / requests

  • Is there a recommended way to disable the HelloWindow for CI/batchmode runs?

  • Could realvirtual internally check for Application.isBatchMode and skip showing the HelloWindow in that case?

  • If there is already a setting or flag to turn this off, could you point me to the correct configuration?

Thanks a lot in advance!

Image 1447

Answer

Answer
Planned
Support 1 day ago

RE: HelloWindow occasionally blocks CI builds when running Unity in batchmode


Hi Ramon,

Thanks for the detailed report. You're right - we check for UNITY_CLOUD_BUILD but we're missing a check for Application.isBatchMode which is why it can still appear when running Unity with -batchmode for CI pipelines.

Workarounds until the official fix:

Option 1: Add DEV define to your build command (Recommended)

Unity.exe -batchmode -projectPath C:\Project -runTests ... -defineSymbols DEV

Option 2: Set the define via script before tests run Create an editor script that runs before your tests:

[InitializeOnLoad]
public static class CISetup
{
    static CISetup()
    {
        if (Application.isBatchMode)
        {
            // Prevents HelloWindow from showing
            PlayerSettings.SetScriptingDefineSymbols(
                NamedBuildTarget.Standalone, "DEV");
        }
    }
}

Option 3: Patch locally In Assets/realvirtual/private/Editor/OnPostProcessImportAsset.cs line 142, change:

if (Game4AutomationImport && !Application.isPlaying)

to:

if (Game4AutomationImport && !Application.isPlaying && !Application.isBatchMode)

Fix: We'll include this batch mode check in the next release.

Thanks for reporting!

Ramon Janousch 6 days ago

We use version

6.2.1.7128 (Unity 6000.2.10f1)

I see that you are no longer opening the window for cloud builds (!UNITY_CLOUD_BUILD && !DEV).
It may be that it only appears in the headless tests.

We use something
C:\Program Files\Unity\Hub\Editor\6000.2.10f1\Editor\Unity.exe" -batchmode -projectPath C:\Project -runTests -testPlatform EditMode -assemblyNames Project.Common.Tests -testResults C:\Project\TestResults\EditMode\EditModeResults_20251218_171253.xml -logFile C:\Project\TestResults\EditMode\EditModeEditor_20251218_171253.log -enableCodeCoverage -coverageResultsPath C:\Project\Coverage\EditMode -coverageHistoryPath C:\Project\Coverage\History -coverageOptions generateHtmlReport;generateAdditionalReports;generateBadgeReport;assemblyFilters:+Project.*,-*Tests

Ramon Janousch 6 days ago

I can confirm that it only pops up when I run the tests.
I also see this window (not blocking CI, just annoying).

Image 1448

Answer
Planned
Support 1 day ago

RE: HelloWindow occasionally blocks CI builds when running Unity in batchmode


Hi Ramon,

Thanks for the detailed report. You're right - we check for UNITY_CLOUD_BUILD but we're missing a check for Application.isBatchMode which is why it can still appear when running Unity with -batchmode for CI pipelines.

Workarounds until the official fix:

Option 1: Add DEV define to your build command (Recommended)

Unity.exe -batchmode -projectPath C:\Project -runTests ... -defineSymbols DEV

Option 2: Set the define via script before tests run Create an editor script that runs before your tests:

[InitializeOnLoad]
public static class CISetup
{
    static CISetup()
    {
        if (Application.isBatchMode)
        {
            // Prevents HelloWindow from showing
            PlayerSettings.SetScriptingDefineSymbols(
                NamedBuildTarget.Standalone, "DEV");
        }
    }
}

Option 3: Patch locally In Assets/realvirtual/private/Editor/OnPostProcessImportAsset.cs line 142, change:

if (Game4AutomationImport && !Application.isPlaying)

to:

if (Game4AutomationImport && !Application.isPlaying && !Application.isBatchMode)

Fix: We'll include this batch mode check in the next release.

Thanks for reporting!

Customer support service by UserEcho