EmBitz

Have forgot how to turn on "live view" when mousing over changing variables , how was this done?
Example:
MG6acc1+= MG6fc1;              // 32bit up counter
MG6buff1= MG6acc1>>16;     //16 top MSB up count stored in MG6buff1

I can see MG6acc1 counter values flying by but nothing in MG6buff1 when mousing over.

Is that MG6buff1 a local or a global (static) variable? Every variable known by GDB can be live observed.

Could you share a small project to show us what you are doing?

MG6buff1 is a global accessible variable. It's part of a old but active project, cant share it, mousing over used to work.

Apparently it is working because  MG6acc1  is visible.
Did you change the optimization level?

I can't help you because I don't see that problem here, unless you make a small project with that problem, and share it.

Tips:
1) Try a GDB query of that variable in the debug terminal window. I guess it is unknown.
2) Add that variable to the watches and turn live view on, and see what happens.