SharePoint 2013 wsp upgrading error: Cannot uninstall Language Pack 0 because it is not deployed when attempting to uninstall-spsolution.

While updating a wsp in SharePoint 2013 environment I got an error saying that “Cannot uninstall Language Pack 0 because it is not deployed when attempting to uninstall-spsolution.” As shown the image below.

By checking the solution in farm solutions (Central Administration -> System Settings -> Manage Farm Solutions) Solution wasn’t deployed. I have found this blog explaining the issue. The reason for this error is that DLL’s in the GAC were not able to delete. So I have deleted the DLL’s in the GAC and deployed through SharePoint central Administration

If it is timer job, We have to Stop and SharePoint timer services in the services.

Hope this helps.

Deploy solutions in share point 2013

SharePoint 2013 supports backward compatibility, for the sites created in SharePoint 2010. We can achieve this by using 14 layout folder. In SharePoint 2013 server we can have both 14 and 15 layout folders

If we want same features in SharePoint 2010 as well as 2013, we need to use SharePoint product version for solution properties. In the image below we are assigning 15 for SharePoint Product version. Means solution will deployed to 15 folder.

manifest.xml file shown below, here I have set the SharepointProductVersion as 15, so that file will deployed to 15 folder.

<Solution xmlns="http://schemas.microsoft.com/sharepoint/" SolutionId="7b9510ed-0926-4692-8afd-76fe5f629b00" SharePointProductVersion="15.0">

  <Assemblies>

    <Assembly Location="MySharepointProject.dll" DeploymentTarget="GlobalAssemblyCache">

      <SafeControls>

        <SafeControl Assembly="$SharePoint.Project.AssemblyFullName$" Namespace="MySharepointProject" TypeName="*" />

      </SafeControls>

    </Assembly>

  </Assemblies>

  <FeatureManifests>

    <FeatureManifest Location="MySharepointProject_Feature1\Feature.xml" />

  </FeatureManifests>

</Solution>

By deploying through stsadm commands Install-SPSolution command, we have a new parameter called CompatabilityLevel. By providing the options to compatabilty parameter we can specify the deployment target. CompatabilityLevel is an optional parameter. If we are not specified any value, deployment target will depends on solution cabinet manifest.xml file. Install Solution command only deploys the installed solution in SharePoint server.

Following are the options for compatabilityLevel parameter.

“14” -> Installs solution in 14 hive

“15” -> installs solution in 15 hive

“14,15” -> Installs solution to both 14 and 15 directories “AllVersions” or “All” -> Installs solution to both 14 and 15 directories “OldVersions” or “Old” -> Installs solution to 14 directories only “NewVersion” or “New” -> Installs solution to 15 directories only