In the Windows Installer Editor (Launched from Wise Package Studio -> Tools), when selecting a file to install you can get the following error:
Failed to scan .NET information for assembly <<File Path>>.
Install version 2.0 (or higher) of the .NET Framework or later and repair your Wise product installation to resolve this issue.
This is most likely because .NET 2 was installed after Wise Package Studio was installed. This error is safe to ignore, but can be fixed by installing .NET 2 then reinstalling Wise Package Studio.