I recently used a PowerShell Script to Deploy a Custom .wsp solution in the Solution Gallery and activate it.
However, when running the Install-SPUserSolution command I had this error: Install-SPUserSolution : Unable to load assembly group. The user assembly group provider threw an exception while trying to provide user assemblies for the specified assembly group.
S
Inner Exception: System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. at Microsoft.SharePoint.SPListItemCollection.get_Item(Int32 iIndex) at Microsoft.SharePoint.Administration.SPSolutionLanguagePack.GetSolutionInfoFromGallery(Guid siteId, Guid solutionId, String solutionHash, String& fileName, String& hash, Byte[]& fileBytes) at Microsoft.SharePoint.UserCode.SPUserCodeLightweightSolutionAssemblyGroupProvider.GetAssembliesInGroup(Guid siteId, String assemblyGroupI…
06/13/2012 08:26:25.57* SPUCHostService.exe (0x06A0) 0x025C SharePoint Foundation Sandboxed Code Service fe66 Medium …d) at Microsoft.SharePoint.UserCode.SPUserCodeAssemblyCacheManager.EnsureUserCodeAssemblyGroupIsCached(Guid siteId, SPUserCodeAssemblyGroupId userCodeAssemblyGroupId)
The Fix:
In the WebApplication UserPolicy, add the Service Account used for “Microsoft SharePoint Foundation Sandboxed Code Service” with “Full Control” rights.
This should fix the problem.
