When launching a seemless AppV application. There is an error "%1 is not a valid win32 application"
Workaround
1. In the vWorkspace Management Console, Expand resources | Managed Applications
2. Right Click New
3. Fill in the normal Name details
4. Set the Application type to Program
5. Select the machine to publish the App on (This is the machine running the AppV client)
6. Under program path, select the sfttray.exe eg: c:\Program Files (x86)\Microsoft Application Virtualization Client\sfttray.exe
7. Under program Arguments, set the path to the OSD file. eg: \\appv\Content\defaultapp.osd
8. Create the rest of the App as normal and assign it to whichever users need the AppV app.