https://devzone.nordicsemi.com/f/nordic-q-a/76384/undefined-reference-to-__start_sdh_stack_observers-errorI am getting linker errors such as the following: Output/Release/Obj/saadc_pca10056/nrf_sdh.o:SDK\components\softdevice\common/nrf_sdh.c:83: undefined reference to `start_sdh_req_observers&#39; Output/Release/Obj/saadc_pca10056/nrf_sdh.o:(.rodata.sdh_req_observersen-USTelligent Community 13Mon, 21 Jun 2021 17:52:17 GMThttps://devzone.nordicsemi.com/thread/316345?ContentTypeID=1Mon, 21 Jun 2021 17:52:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fe88b07d-b6b7-4912-98e7-a913128113e3Sigurd[quote user="rezKamal"]Any idea what could be off?[/quote] <p>&nbsp;See this post:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/70188/error-cannot-find-run-section-cli_sorted_cmd_ptrs_run-referenced-in-cli_sorted_cmd_ptrs/288053#288053">https://devzone.nordicsemi.com/f/nordic-q-a/70188/error-cannot-find-run-section-cli_sorted_cmd_ptrs_run-referenced-in-cli_sorted_cmd_ptrs/288053#288053</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/315679?ContentTypeID=1Wed, 16 Jun 2021 14:55:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d965edf3-2a42-4c3f-8c29-aa7419a84e06rezKamal<p>Thanks! I copied that into a new file which I named new_flash_placement.xml and placed into my project directory. Then I went to the Solution options and changed the section placement file to &#39;$(ProjectDir)/new_flash_placement.xml. I am not sure if this is the right approach, but it&nbsp;replaced my existing errors with&nbsp;the following:</p> <p>&quot;cannot find run section .cli_sorted_cmd_ptrs_run referenced in cli_sorted_cmd_ptrs&quot;</p> <p>Any idea what could be off?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/315638?ContentTypeID=1Wed, 16 Jun 2021 13:25:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:427af869-e279-4bc8-b077-06686f6c5f30Sigurd<p>Hi,</p> <p>Try this flash_placement.xml</p> <p><pre class="ui-code" data-mode="text">&lt;!DOCTYPE Linker_Placement_File&gt; &lt;Root name=&quot;Flash Section Placement&quot;&gt; &lt;MemorySegment name=&quot;FLASH&quot; start=&quot;$(FLASH_PH_START)&quot; size=&quot;$(FLASH_PH_SIZE)&quot;&gt; &lt;ProgramSection load=&quot;no&quot; name=&quot;.reserved_flash&quot; start=&quot;$(FLASH_PH_START)&quot; size=&quot;$(FLASH_START)-$(FLASH_PH_START)&quot; /&gt; &lt;ProgramSection alignment=&quot;0x100&quot; load=&quot;Yes&quot; name=&quot;.vectors&quot; start=&quot;$(FLASH_START)&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.init&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.init_rodata&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.text&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.sdh_soc_observers&quot; inputsections=&quot;*(SORT(.sdh_soc_observers*))&quot; address_symbol=&quot;__start_sdh_soc_observers&quot; end_symbol=&quot;__stop_sdh_soc_observers&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.pwr_mgmt_data&quot; inputsections=&quot;*(SORT(.pwr_mgmt_data*))&quot; address_symbol=&quot;__start_pwr_mgmt_data&quot; end_symbol=&quot;__stop_pwr_mgmt_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.sdh_ble_observers&quot; inputsections=&quot;*(SORT(.sdh_ble_observers*))&quot; address_symbol=&quot;__start_sdh_ble_observers&quot; end_symbol=&quot;__stop_sdh_ble_observers&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.sdh_req_observers&quot; inputsections=&quot;*(SORT(.sdh_req_observers*))&quot; address_symbol=&quot;__start_sdh_req_observers&quot; end_symbol=&quot;__stop_sdh_req_observers&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.sdh_state_observers&quot; inputsections=&quot;*(SORT(.sdh_state_observers*))&quot; address_symbol=&quot;__start_sdh_state_observers&quot; end_symbol=&quot;__stop_sdh_state_observers&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.sdh_stack_observers&quot; inputsections=&quot;*(SORT(.sdh_stack_observers*))&quot; address_symbol=&quot;__start_sdh_stack_observers&quot; end_symbol=&quot;__stop_sdh_stack_observers&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.nrf_queue&quot; inputsections=&quot;*(.nrf_queue*)&quot; address_symbol=&quot;__start_nrf_queue&quot; end_symbol=&quot;__stop_nrf_queue&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.nrf_balloc&quot; inputsections=&quot;*(.nrf_balloc*)&quot; address_symbol=&quot;__start_nrf_balloc&quot; end_symbol=&quot;__stop_nrf_balloc&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.cli_command&quot; inputsections=&quot;*(.cli_command*)&quot; address_symbol=&quot;__start_cli_command&quot; end_symbol=&quot;__stop_cli_command&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.crypto_data&quot; inputsections=&quot;*(SORT(.crypto_data*))&quot; address_symbol=&quot;__start_crypto_data&quot; end_symbol=&quot;__stop_crypto_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.log_const_data&quot; inputsections=&quot;*(SORT(.log_const_data*))&quot; address_symbol=&quot;__start_log_const_data&quot; end_symbol=&quot;__stop_log_const_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.log_backends&quot; inputsections=&quot;*(SORT(.log_backends*))&quot; address_symbol=&quot;__start_log_backends&quot; end_symbol=&quot;__stop_log_backends&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.nrf_sections&quot; address_symbol=&quot;__start_nrf_sections&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.cli_sorted_cmd_ptrs&quot; inputsections=&quot;*(.cli_sorted_cmd_ptrs*)&quot; runin=&quot;.cli_sorted_cmd_ptrs_run&quot;/&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.fs_data&quot; inputsections=&quot;*(.fs_data*)&quot; runin=&quot;.fs_data_run&quot;/&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.log_dynamic_data&quot; inputsections=&quot;*(SORT(.log_dynamic_data*))&quot; runin=&quot;.log_dynamic_data_run&quot;/&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;Yes&quot; name=&quot;.log_filter_data&quot; inputsections=&quot;*(SORT(.log_filter_data*))&quot; runin=&quot;.log_filter_data_run&quot;/&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.dtors&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.ctors&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.rodata&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; name=&quot;.ARM.exidx&quot; address_symbol=&quot;__exidx_start&quot; end_symbol=&quot;__exidx_end&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; runin=&quot;.fast_run&quot; name=&quot;.fast&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; runin=&quot;.data_run&quot; name=&quot;.data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;Yes&quot; runin=&quot;.tdata_run&quot; name=&quot;.tdata&quot; /&gt; &lt;/MemorySegment&gt; &lt;MemorySegment name=&quot;RAM1&quot; start=&quot;$(RAM_PH_START)&quot; size=&quot;$(RAM_PH_SIZE)&quot;&gt; &lt;ProgramSection load=&quot;no&quot; name=&quot;.reserved_ram&quot; start=&quot;$(RAM_PH_START)&quot; size=&quot;$(RAM_START)-$(RAM_PH_START)&quot; /&gt; &lt;ProgramSection alignment=&quot;0x100&quot; load=&quot;No&quot; name=&quot;.vectors_ram&quot; start=&quot;$(RAM_START)&quot; address_symbol=&quot;__app_ram_start__&quot;/&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.nrf_sections_run&quot; address_symbol=&quot;__start_nrf_sections_run&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.cli_sorted_cmd_ptrs_run&quot; address_symbol=&quot;__start_cli_sorted_cmd_ptrs&quot; end_symbol=&quot;__stop_cli_sorted_cmd_ptrs&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.fs_data_run&quot; address_symbol=&quot;__start_fs_data&quot; end_symbol=&quot;__stop_fs_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.log_dynamic_data_run&quot; address_symbol=&quot;__start_log_dynamic_data&quot; end_symbol=&quot;__stop_log_dynamic_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.log_filter_data_run&quot; address_symbol=&quot;__start_log_filter_data&quot; end_symbol=&quot;__stop_log_filter_data&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; keep=&quot;Yes&quot; load=&quot;No&quot; name=&quot;.nrf_sections_run_end&quot; address_symbol=&quot;__end_nrf_sections_run&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.fast_run&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.data_run&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.tdata_run&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.bss&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.tbss&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; name=&quot;.non_init&quot; /&gt; &lt;ProgramSection alignment=&quot;4&quot; size=&quot;__HEAPSIZE__&quot; load=&quot;No&quot; name=&quot;.heap&quot; /&gt; &lt;ProgramSection alignment=&quot;8&quot; size=&quot;__STACKSIZE__&quot; load=&quot;No&quot; place_from_segment_end=&quot;Yes&quot; name=&quot;.stack&quot; address_symbol=&quot;__StackLimit&quot; end_symbol=&quot;__StackTop&quot;/&gt; &lt;ProgramSection alignment=&quot;8&quot; size=&quot;__STACKSIZE_PROCESS__&quot; load=&quot;No&quot; name=&quot;.stack_process&quot; /&gt; &lt;/MemorySegment&gt; &lt;/Root&gt; </pre></p><div style="clear:both;"></div>