Lotus Notes 8.5.1 RCP Base Plug-in not found

I had a co-worker receive this error while upgrading from Lotus Notes 8.5 to 8.5.1. After looking closer she had 8.5 standard full install with admin and designer. The issue was the 8.5.1 package installed was the 8.5.1 standard only ( CZ5S3EN ) when it should have been 8.5.1 Standard full ( CZ5S0EN ). After running the correct install, the error did not come back