[ UNIX only] If any of the keys required by the delivery image (whether upon startup, for loading layered products, or for authorising the product code :none ) are dated, then the earliest expiration date of all such keys will be hard-wired into the run-time application when it is delivered. When you obtain undated keys for any Xanalys product, it is therefore advisable to either delete or comment out any corresponding dated keys from that keyfile.