Dan, what EZrain firmware version do you have? Since introduction, EZRain has had to accommodate many versions of the PLM, from the original 1.x that did not have a links databse to the currently shipped 62. Extended messages were only supported by the PLM starting with version 52. The product data key message is also fairly recent and we implemented it in EZRain starting with version 2.0. We’d be happy to upgrade your unit.