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Editorial Team
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Asked: 2026-06-14T00:56:34+00:00

When I try and upload a vsix package to the Visual Studio Gallery, I

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When I try and upload a vsix package to the Visual Studio Gallery, I get the error message:

Invalid Multiple Zip Files in in VSIX

Does anyone know why this would be?

The package is at: http://sharpgl.codeplex.com/releases/view/82739 named ‘SharpGL 2.0 Visual Studio Extension’, and works fine on every machine I’ve tried it on.

Thanks in advance!

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1 Answer

  1. Editorial Team

    This problem occurs when a manifest’s <ProjectTemplate> element’s directory contains more than one ZIP file. For example, in my case, I had <ProjectTemplate>ProjectTemplates</ProjectTemplate> with this file system structure:

    ProjectTemplates
|--CSharp
|  |--Web
|     |--Template.zip
|--VisualBasic
|  |--Web
|     |--Template.zip

    The solution is to modify the manifest to contain as many <ProjectTemplate> elements as you have ZIP files, then structure the directories such that each <ProjectTemplate> doesn’t lead to more than one ZIP:

    <ProjectTemplate>T1</Proj    
<ProjectTemplate>T2</ProjectTemplate>

T1
|--CSharp
|  |--Web
|     |--Template.zip
T2    
|--VisualBasic
|  |--Web
|     |--Template.zip
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