"Read only" drawing files won't open.

Good day everyone:

Since upgrading to SW2016 (Service Pack 3) I can't open "read only" drawings. I have to remove the read only status and then they will open. These drawings are set to read only for security so I need to keep them that way.

Has anyone else experienced this? and if so, did you find a solution?

Thanks in advance.

Jim

SolidworksDrawings And Detailing