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Question by Andrew Meggs · Mar 26, 2011 at 05:56 PM · androidbuild-error

Android build problem: XmlException Not allowed character

I've got a project that builds and runs fine for iOS, web, and standalone. When attempting to build for Android on MacOS, using Unity 3.3.0f4, I get the following error:

Exception: Error building Player: XmlException: Not allowed character was found. file:/// (my project path) /Temp/StagingArea/res/values/strings.xml Line 1, position 8. UnityEditor.BuildPlayerWindow.BuildPlayerWithDefaultSettings (Boolean askForBuildLocation, BuildOptions forceOptions) UnityEditor.BuildPlayerWindow.GUIBuildButtons (Boolean enableBuildButton, Boolean enableBuildAndRunButton, Boolean canInstallInBuildFolder) UnityEditor.BuildPlayerWindow.ShowBuildTargetSettings () UnityEditor.BuildPlayerWindow.OnGUI () System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation. System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) UnityEditor.HostView.Invoke (System.String methodName) UnityEditor.HostView.OnGUI ()

The strings.xml file it's complaining about just looks like this:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">Unity Player</string>
</resources>

I confirmed with a hex editor that there are no weird invisible non-ascii characters in it. This is very banal generic stuff, and since the file is being generated by Unity as part of the build, I have no idea how to start fixing it.

I can build other Android projects on this system, so I'm fairly sure there's nothing fundamentally broken about my Android SDK install.

Anyone seen this, or have ideas?

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Answer by jyenawine · Jul 18, 2011 at 10:55 PM

I discovered a mysterious 0x1B character had appeared at the end of the Product Name string stored in the projectSettings.asset file. Using Unity Editor v3.4.0f2 I re-typed my Product Name (Edit->Project Settings->Player) and saved, and the character went away. I tried this on both the PC and the Mac. At this point I'm not sure how that extra character got there in the first place.

Once this extraneous character went away, I was able to build the project again.

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