No section matches selector （nRF5_SDK_13.1.0_7，52832）

[victor_CHINA]

hi dear nordic employee:

I tried to build the project ble_app_hrs_c（pca10040） by keil5

but I get an error :

._build\nrf52832_xxaa.sct(7): error: L6236E: No section matches selector - no section to be FIRST/LAST.

where is wrong？

thanks