Unexpected error from app_error_handler

[Sunil vignesh]

Hi, I have developed the custom services for nrf52832 with sdk16 in SES

in write character

Sometimes the write option works fine

unexpected error after write function and system get hanged

while i debug the nrf52832.

I received error state like

and in nrf connect  show

ERROR8(0x8)  gatt conn timeout

ERROR 133(0x85) gatt error

suggest me to overcome this error

[Hung Bui]

Please check the file name and line number and error code i when you break into  app_error_handler()

[Sunil vignesh]

line number : 200024a4

how to identify the line

[Hung Bui]

It's the memory address of the line number, you would need to check the value of the line number. 
Please have a look at the debug guide here.

[Sunil vignesh]

I have seen my code. that the function repeatedly enable the timer (APP_TIMER_START()) means. this error will occur. is it correct?

what will happen when i call app_timer_start again and again

[Hung Bui]

No, it most likely not the reason why it crashed. You can find the code inside app_timer_start() it will simply return if the app_timer is already active. 
Please try to follow what we described in the guide and find the line of code, the filename and the error code that cause the assertion. 

[Sunil vignesh]

I received the error like

<error> app: ERROR 3735928559 [Unknown error code] at F:\1.nRF52\1.SDK_C/components/libraries/timer/app_timer2.c:298
PC at: 0x0003368B
<error> app: End of error report

what is "PC at: 0x0003368B"

and line 298 in app_timer2.c

 ASSERT(app_timer_cnt_diff_compute(drv_rtc_counter_get(p_instance),
                                          mp_active_timer->end_val & RTC_COUNTER_COUNTER_Msk) < APP_TIMER_SAFE_WINDOW);

        NRF_LOG_INST_DEBUG(mp_active_timer->p_log, "Compare EVT");