Originally Posted by OMOMs
I don't know if that's even possible. There are many Reason devices that Essentials doesn't have. For example there's no Thor in Essentials, or a dynamic section on the SSL mixer.
see the differences here:
correct me if I'm wrong, but I believe there are ReFills created for Essentials especially.
If a patch contains a device not included in Essentials, it will tell you that it can't be opened.
Otherwise, there's really no issue with opening refills.