error app: Fatal error ?

[RixtronixLAB]

Dear Members,

How can I find the cause of

<error> app: Fatal error ?

I can't see an error code ?

Is it possible hardware error because voltage surge ? Can capacitor rectify it ?

Thanks

[RixtronixLAB]

I get a clue just now, when the board lost connection with the sensor, ANT HRM sensor, it's giving me

"error app: Fatal error"

If I used Keil, how can set "Debug" build ?

[Einar Thorsrud]

With Keil, go to Project -> Options for Target ...., and then select the C/C++ tab. There add "DEBUG" and "DEBUG_NRF" to the preprocessor define list as shown here:

If you want to debug (break in code, inspect with a debugger etc.) it makes sense to also set the optimization level to 0. That is not related to logging, though.

[RixtronixLAB]

Thanks Einar, I'm compiling and uploading now, I'll keep posted