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Structure is not linked between header files "#20 identifier "MngMen" is undefined"

Part Number: LAUNCHXL2-RM57L

Tool/software: TI C/C++ Compiler

Hi Currently, I used CCS to program an application in RM57L. I create some libraries, One of these, "SD_MemOwnFunc.h," which uses a struct declared in other library header files "WorkFlow.h" as an input type parameter.

I insert the respective include in SDMem_OwnFunc.h, as shown in the figure. However, when I try to build, I obtain the next errors.

I used the search tool, and I find that the struct name has not to conflict in another part of programming files, or it was not used in another context. 

Also, I used the verbose diagnosis to search for the specific part, but I obtained no relevant information about the error. 

I don't understand what's the reason for the error. My CCS version is 10.

Regards