Segger Embedded Studio -`UNPLACED_SECTIONS' problem

Question

Hello, 
 I try to start developing my nrf51/nrf52 projects using Segger Embedded Studio but each time I receive the same linker error: 
 
 "(...) section fs_data' will not fit in region UNPLACED_SECTIONS'" 
 
 In my case fds.c or fstorage.c is the problem but i saw at this forum that others have problems with diffrent libraries. 
 Looking forward to any help.
Cheers! 
 EDIT: For better readability I will try to add more detail of the problem: 
 I import Keil 4 project into Segger E. Studio. I follow the import procedure located at this topic:
 devzone.nordicsemi.com/.../ 
 the exact error message I receive is: 
 
 "(...) section fs_data' will not fit in region UNPLACED_SECTIONS'" 
 "section fs_data loaded at
[00000000,0000000f] overlaps section
.vectors loaded at
[00000000,000000a7]" 
 "region
`UNPLACED_SECTIONS' overflowed by 17
bytes" 
 
 Next thing is I know where sections are defined (flash_placement.xml) but I have no idea what and how to change to make fs_data fit into the sections. I also found the .c file section options view (properties of the file -> secition options) but again nothing helpful is there. 
 I still try to dig the problem - If i find sth I will edit this post

Piotr Fiszer · Accepted Answer

I almost got it: It was enough to add fs_data line in flash_placement.xml to get rid of UNPLACED_SECTIONS linker error: (...) That fallowed to lack of __stop_fs_data and __start_fs_data definitions. Then I found this: Linker scripts Keil does not require linker scripts. Named sections are generated automatically when registration macros are invoked. For GCC compilations, you must add a definition for a linker script used in the compilation.This addition should be at the root level of the linker script file: SECTIONS { .fs_data_out ALIGN(4): { PROVIDE( __start_fs_data = .); KEEP(*(fs_data)) PROVIDE( __stop_fs_data = .); } = 0 } This definition will add a named section fs_data that is aligned to a word and that has __start_fs_data and __stop_fs_data as symbols that are used from the code. For IAR compilations, you must make additions to an ilink file. in Nordic InfoCenter infocenter.nordicsemi.com/index.jsp It should be super easy from this point. BUT I try to attach this simple linker script to Segger E. Studio without success... Help will be appreciated. How to do it properly? EDIT + FINAL ANSWER: devzone.nordicsemi.com/.../ finally solved the problem (notice the dot "." in front of fs_data section definition in this solution!) topic to close

Segger Embedded Studio -`UNPLACED_SECTIONS' problem

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