How can you have 1 group with 4 systems? Something doesn't seem right here.
Each system, thinking conventionally, should have 1 or more groups underneath it. Doing the subtraction, you have 3 systems with no groups.
That doesn't make sense (unless you have 3 systems that are trunked running in ID Search mode, and even then, you need to select at least 1 site). I'm wondering if that's what the message is complaining about.
If you look at the supplied chart, you will see that there are limits to the number of channels per group that you can have.
It would be very helpful to know precisely what it is you're trying to program. I can see you're in Nebraska and in Cass County. Here is our database for that...
Cass County, Nebraska (NE) Scanner Frequencies and Radio Frequency Reference
Look at the bottom for the trunked systems in your area. Be
specific - there are different options for different types of systems
I would suggest making sure the scanner port is set up properly (as documented in the link I gave to you earlier), do a manual clear all, then load up 1 system at a time until you find the one that's causing you grief.
Mike