err_code symbol not found error when debugging in segger?

[puff]

When debugging a project from here devzone.nordicsemi.com/.../ (the ready code from github) Segger Embedded Studio shows err_code sybol not found message in Watch winow, when I try to debug gap_params_init(), however, in other calls before it, SES displayed err_code properly. What could be the reason?

UPD. That was caused probably by the lack of softdevice (brecause of the crash Segger forgot about LOADER options..

These days it just says either Target connection has been lost or Error reading from memory Is it because of the non-original debugger board?

[puff]

see the update, it was just a coincidence: blank custom board (I erased it myself), crashed Segger (some reason, I don't know why), which resulted probably in usaved option to load the softdevice. As far as I got, it was uploading just an app. After I uploaded a softdevice, everything started working just fine, so no need in debugging. However, that might be not a good explanation for 'symbol not found' message and this is probably a question to segger support team...