Hello, Program Arc500 works with Five Scan list then next one knocks all list out of radio and have to start over. Scanner will say nothing enabled on pro 651
Are you trying to "add a scanlist", or additional channels, after the initial programming?
For the object oriented scanners, which includes your Pro-651, as well as the Pro-682, PSR500, -600, and WS1040 & WS1065, any channels & systems you try to upload via software wipes out any previous programming. You could still add additional channels, but only if you did so manually, via the keypad. But, when using software, you would need to combine whatever was already loaded, as well as whatever you are trying to add, in a scanlist in the software, then load the expanded scanlist(s).