Error while packaging even empty project (iOS)

Development Platform & Builds
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1

After update 4.22.1 I can’t build even absolutely empty c++ project. Worse with every new release…

Project.Package: ********** PACKAGE COMMAND STARTED **********
IOSPlatform.Package: Package /Users/corvisalex/Documents/UnrealProjects/MyProject/MyProject.uproject
UnrealPluginLanguage.Init: UPL Init: None
Log.WriteException: ==============================================================================
Log.WriteException: ERROR: System.NullReferenceException: Object reference not set to an instance of an object
Log.WriteException:          at Tools.DotNETCommon.FileSystemReference.CombineStrings (Tools.DotNETCommon.DirectoryReference BaseDirectory, System.String[] Fragments) [0x00047] in <085be0bc00f949cb96d5902ac1676522>:0 
Log.WriteException:          at Tools.DotNETCommon.FileReference.Combine (Tools.DotNETCommon.DirectoryReference BaseDirectory, System.String[] Fragments) [0x00000] in <085be0bc00f949cb96d5902ac1676522>:0 
Log.WriteException:          at IOSPlatform.WriteEntitlements (AutomationTool.ProjectParams Params, DeploymentContext SC) [0x000a5] in <16fb4bc5a573476dbe4cf507da746cc6>:0 
Log.WriteException:          at IOSPlatform.Package (AutomationTool.ProjectParams Params, DeploymentContext SC, System.Int32 WorkingCL) [0x00457] in <16fb4bc5a573476dbe4cf507da746cc6>:0 
Log.WriteException:          at Project.Package (AutomationTool.ProjectParams Params, System.Int32 WorkingCL) [0x000bc] in <2d06b1c78c30473983e756542991f787>:0 
Log.WriteException:          at BuildCookRun.DoBuildCookRun (AutomationTool.ProjectParams Params) [0x00094] in <2d06b1c78c30473983e756542991f787>:0 
Log.WriteException:          at BuildCookRun.ExecuteBuild () [0x00040] in <2d06b1c78c30473983e756542991f787>:0 
Log.WriteException:          at AutomationTool.BuildCommand.Execute () [0x00001] in <12df2f08c3b644f29f037eda010f02c3>:0 
Log.WriteException:          at AutomationTool.Automation.Execute (System.Collections.Generic.List`1[T] CommandsToExecute, System.Collections.Generic.Dictionary`2[TKey,TValue] Commands) [0x0007c] in <12df2f08c3b644f29f037eda010f02c3>:0 
Log.WriteException:          at AutomationTool.Automation.Process (System.String[] Arguments, UnrealBuildTool.StartupTraceListener StartupListener) [0x0026f] in <12df2f08c3b644f29f037eda010f02c3>:0 
Log.WriteException:          at AutomationTool.Program.MainProc (System.String[] Arguments, UnrealBuildTool.StartupTraceListener StartupListener) [0x00001] in <0237adef54404c48b8fc24e3cc3bd2ab>:0 
Log.WriteException:          at AutomationTool.Program+<>c__DisplayClass1_0.<Main>b__2 () [0x00000] in <0237adef54404c48b8fc24e3cc3bd2ab>:0 
Log.WriteException:          at AutomationTool.InternalUtils.RunSingleInstance (System.Func`1[TResult] Main) [0x000a0] in <12df2f08c3b644f29f037eda010f02c3>:0 
Log.WriteException:          at AutomationTool.Program.Main (System.String[] Arguments) [0x0020a] in <0237adef54404c48b8fc24e3cc3bd2ab>:0 
Log.WriteException:        (see /Users/corvisalex/Library/Logs/Unreal Engine/LocalBuildLogs/Log.txt for full exception trace)
2

Hello,

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Thanks

3

We have exactly the same problem. Also tested on an empty c++ project. Build fails for iOS with the same log as above.

4

I found! It’s a problem with auto signing.
It comes from IOSPlatform.Automation.cs, method WriteEntitlements:

FileReference MobileProvisionFile = FileReference.Combine(MobileProvisionDir, Params.Provision);

Combine called without any check. But Params.Provision always null if auto signing is enabled according to the following code (IOSExports.cs):

	public static void GetProvisioningData(FileReference InProject, bool Distribution, out string MobileProvision, out string SigningCertificate, out string TeamUUID, out bool bAutomaticSigning)
	{
		IOSProjectSettings ProjectSettings = ((IOSPlatform)UEBuildPlatform.GetBuildPlatform(UnrealTargetPlatform.IOS)).ReadProjectSettings(InProject);
		if (ProjectSettings == null)
		{
			MobileProvision = null;
			SigningCertificate = null;
			TeamUUID = null;
			bAutomaticSigning = false;
			return;
		}
		if (ProjectSettings.bAutomaticSigning)
		{
			MobileProvision = null;
			SigningCertificate = null;
			TeamUUID = ProjectSettings.TeamID;
			bAutomaticSigning = true;
		}
		else
		{
			IOSProvisioningData Data = ((IOSPlatform)UEBuildPlatform.GetBuildPlatform(UnrealTargetPlatform.IOS)).ReadProvisioningData(ProjectSettings, Distribution);
			if (Data == null)
			{ // no provisioning, swith to automatic
				MobileProvision = null;
				SigningCertificate = null;
				TeamUUID = ProjectSettings.TeamID;
				bAutomaticSigning = true;
			}
			else
			{
				MobileProvision = Data.MobileProvision;
				SigningCertificate = Data.SigningCertificate;
				TeamUUID = Data.TeamUUID;
				bAutomaticSigning = false;
			}
		}
	}
5

Hey, B REX, you can try to disable auto signing in iOS settings. It solved my problem.

6

Thanks, that worked!

7

I was having the same issue and disabling auto-signing did fix it.

But is that the optimal way to go? I’m not exactly sure what auto-signing does and if it’s ideal to have it turned on or not