AVR-Chat

Can anyone tell me if they have successfully used AVR Studio 4.12 (build 
498) to debug C source code (gcc-avr elf format) using an ICE200 ?

I'm doing some "code maintenance" on an old project using an AT90S8535, 
most certainly a step back in time.

It seems I can setup the Winavr project and build my source but it will not 
enable the debug menu with the ICE200 selected as the debug platform.  I 
can close my project and load the elf file separately, select the 
ICE200/8535 target and run the code, at an assembly level.   This is also 
another step back in time.

I can remember using COFF converters a long time ago but that was never 
very successful.  I have become rather used to C-source debugging using AVR 
Studio and the JTAGICEmk2 but I'd prefer to continue to use the AT90S8535 
instead of replacing it with a ATMEGA8535 if I can avoid it.

Any pointers great fully appreciated.

Cheers

Matthew