Closing a Cubase 7 Project, with Halion Sonic Plugin

I am using Cubase 7.05. Here is what happens when I close any Project that has a Halion Sonic Instrument.
I get the message " Do you want to Save, Not Save, or Cancel ".

This happens even though I have not made any changes to the Project. And it only happens if there is one or more Halion Sonic Instruments in the Project.
It does not happen if there is no Halion Sonic instrument in the Project.

To confirm that the problem is related to Halion Sonic, I created a test Project with only a Halion Sonic Instrument. Then I closed it, and got the message upon closing.

Just simply opening the Project, and closing it immediately, brings up the message.

Does anyone know how to stop this from occurring ?