depot

Hello, I am trying to update the Serial Number on an R7 in MOTOTRBO DepotTool V14. Every time I try and write it, I get Error #8874. It works great on 7550 though. Thanks.

Just to start off, i'm not looking for free versions or anything like that, nor am i looking to learn how to use them. I'm just curious as to the difference between them? Are they separate software or is Depot a more robust version of CPS? I am new to the moto world and slowly picking things up...