We just ran into the issue @JeffSchwenk refers to in his opening quote, but with ShipGear. Client is on v2013. The night before, we installed v2016 on the same server and migrated the production company to begin testing. We copied the v2013 production company to a test company. In the am, they discovered ShipGear was now looking at v2016 instead of v2013. Still working on a solution to running both installations.