One of the steps in our installation sequence involves installing a 3rd party msi. It is rather large, so we have managed to get an msp patch file from them to use in an upcoming patch of our own product.
How does one install this patch file? I have tried to use the Install/Remove MSI package command, but it returns a 1620 error (This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package)
