AdamHott[m]: > <@greengenie:matrix.org> Hi all, I had success flashing a micro:bit V2 with the led-roulette example from the Discovery book, the application is flashed and the micro:bit V2 is performing as expected, but had an error with RTT during the flashing process: 
> 
> Error Failed to attach to RTT. 
> 
> I went ahead and attempted to debug in VSCode using the probe-rs extension, and get the following error: 
> 
> ERROR probe_rs::cmd::dap_server::server::debugger: Other(Unable to parse CMSIS-SVD file: "/Users/adamh/Dev/discovery-led-roulette-test/target/thumbv7em-none-eabihf/debug/led-roulette". the document does not have a root node)
> 
> I put the source code on github here: https://github.com/CodingInGreen/discovery-led-roulette-test/tree/master
> 
> I made a .gitignore file for the large "target" folder from the discovery book because it is very large. But on my system it is the same as the one from the discovery book.
> 
> Any thoughts on how to resolve?

you need to enable RTT in your firmware. did you do that?

also, you used your ELF binary as an SVD file in vscode which ofc does not work :)