When using CHIRP on a Yaesu VX-170, is it necessary to have the radio connected to the computer in order to modify the programming? I have a VX-170 that I field programmed. I downloaded the radio to CHIRP> I disconnected the radio then tried to modify the programming. Specifically, tried deleting a channel with the "move memory up" option. When I did that  a message came up "searching for memory"... ( or something close to that). Then the program got hung up.

Is this true for other radios as well ? 

Tnx

Mike VE7SML