App Manifest Designer

Question

When opening a "package.windows10.appxmanifest" file in Visual-Studio 2017 with the "App Manifest Designer" I get the error message: The operation cannot be completed. Unknown error.
Can anyone tell me what I am doing wrong?

Answer 1

Hi @Dieter Decklar ,

Welcome to Microsoft Q&A forum.

Did you modify something in this file before this error appear?

To narrow down this issue, I suggest you create a new project, and check if in that project, the .appxmanifest file can be opened with the App Manifest Designer. If the newly created .appxmanifest file still cannot be opened, please try to repair Visual Studio(VS) from VS Installer. If the newly created .appxmanifest file can be opened, then the issue should be related to the project/file itself. If you changed something in this .appxmanifest file, please check if the modification is correct.

Besides, please try to clean your project cache(.vs/obj/bin folder) and rebuild your project then try again. If you changed any VS configurations or have some extensions installed, please let me know.

• Update1:

Hi @Dieter Decklar , are you using the normal UWP project? If so, the .appxmanifest file should be look like following:

<?xml version="1.0" encoding="utf-8"?>  

<Package  
  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"  
  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"  
  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"  
  IgnorableNamespaces="uap mp">  

 <Identity  
   Name="XXX"  
   Publisher="XXX"  
   Version="1.0.0.0" />  

 <mp:PhoneIdentity PhoneProductId="XXX" PhonePublisherId="XXX"/>  

 <Properties>  
 <DisplayName>XXXXX</DisplayName>  
 <PublisherDisplayName>Administrator</PublisherDisplayName>  
 <Logo>Assets\StoreLogo.png</Logo>  
 </Properties>  

 <Dependencies>  
 <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />  
 </Dependencies>  

 <Resources>  
 <Resource Language="x-generate"/>  
 </Resources>  

 <Applications>  
 <Application Id="App"  
   Executable="$targetnametoken$.exe"  
   EntryPoint="xxx">  
 <uap:VisualElements  
   DisplayName="xxx"  
   Square150x150Logo="XXX"  
   Square44x44Logo="XXX"  
   Description="XXX"  
   BackgroundColor="transparent">  
 <uap:DefaultTile Wide310x150Logo="XXX"/>  
 <uap:SplashScreen Image="XXX" />  
 </uap:VisualElements>  
 </Application>  
 </Applications>  

 <Capabilities>  
 <Capability Name="internetClient" />  
 </Capabilities>  
</Package>  

Best Regards,
Tianyu

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