Assign global array of structures of structures of std strings in a dll

Question

I have a dll which consists of three c files. Find bellow the c file of the loader and the three files of the dll. In dll, file 1 and file 2 are almost identical, static arrays names and sizes, structure names, Prepare_1() and Prepare_2() functions. There
is a small difference in the function Prepare_1 in the way MuxStatusSupl[ u32Idx ].FileInfo.Name is assigned and there I get an exception. Another difference is that the structure StructStatus in file 2 has an extra member compare to file 1. From this point
I couldn't strip down even more the sample code because small changes make the problem disappear without, I'm afraid, really solving the problem. That's why I have put so much code here, I'm not even sure what is relevant and what not. For example, if I add
in file 1 in the StructStatus the extra member u32ExitPoint (and, of course, I modify Status_Init accordingly), I don't see the problem anymore.
///////////////////////////////////////////////////// loader file begin ////
#include "stdafx.h"
int main(int argc, char* argv[])
{   HINSTANCE hDLL = LoadLibrary( DLL_FQN_FILE_NAME );
    if( void ( * pCreateDllInterface )( void ) =
            (void(*)())GetProcAddress( hDLL, "CreateDllInterface" ) )
        pCreateDllInterface();
    FreeLibrary( hDLL );
///////////////////////////////////////////////////// loader file end //////
///////////////////////////////////////////////////// dll main file begin //
extern void Prepare_1( void );
extern void Prepare_2( void );
extern "C" _declspec(dllexport) void CreateDllInterface( ) { Prepare_1(); }
///////////////////////////////////////////////////// dll main file end ////
///////////////////////////////////////////////////// dll file 1 begin /////
#include <string>
#include <sys/stat.h>
#define STORAGE_SIZE  254
typedef unsigned long  int uint32;
struct StructFileInfo
{   std::string Name; 
    struct stat FileStatus; 
static struct StructStatus
{   bool bDownloaded;      bool bDownloadedLast;
    bool bCalled;          bool bCalledLast;
    uint32 u32EntryPoint;
    StructFileInfo FileInfo;
} MuxStatusMain[ STORAGE_SIZE ], MuxStatusSupl[ STORAGE_SIZE ];
void Prepare_1() 
{   struct stat Stat_Init;
    memset( &Stat_Init, 0, sizeof(struct stat) );
    StructStatus Status_Init =
                    { false, false, false, false, 0, { "", Stat_Init } };
    std::fill_n( MuxStatusMain, STORAGE_SIZE, Status_Init ); //  this seems
                           // to overwrite MuxStatusSupl[ 3 ].FileInfo.Name
    for( uint32 u32Idx = 0; u32Idx < STORAGE_SIZE; u32Idx++ )
        MuxStatusSupl[ u32Idx ].FileInfo.Name = ""; // crash when u32Idx==3 
///////////////////////////////////////////////////// dll file 1 end ///////
///////////////////////////////////////////////////// dll file 2 begin /////
#include <string>
#include <sys/stat.h>
#define STORAGE_SIZE  254
typedef unsigned long  int uint32;
struct StructFileInfo
{   std::string Name; 
    struct stat FileStatus; 
static struct StructStatus
{   bool bDownloaded;      bool bDownloadedLast;
    bool bCalled;          bool bCalledLast;
    uint32 u32EntryPoint;  uint32 u32ExitPoint;
    StructFileInfo FileInfo;
} MuxStatusMain[ STORAGE_SIZE ], MuxStatusSupl[ STORAGE_SIZE ];
void Prepare_2()
{   struct stat Stat_Init;
    memset( &Stat_Init, 0, sizeof(struct stat) );
    StructStatus Status_Init =
        { false, false, false, false, 0, 0xFFFFFFFF, { "", Stat_Init } };
    std::fill_n( MuxStatusMain, STORAGE_SIZE, Status_Init );
    std::fill_n( MuxStatusSupl, STORAGE_SIZE, Status_Init );
///////////////////////////////////////////////////// dll file 2 end ///////
I get the crash with the message: Unhalted exception at 0x10001f90 in Test.exe: 0xC0000005: Access violation writing location 0x1006d320
Another strange phenomena is that in watch window, expressions
    sizeof(MuxStatusMain)/sizof(MuxStatusMain[0])
    sizeof(MuxStatusMain)/sizof(MuxStatusMain[0])
show both a value of 232 instead of 254 (but if I add in file 1 in the struct the missing member they show the correct values). On the other hand, if I printf those values, they are correct, 254.

Answer 1

"Another difference is that the structure StructStatus in file 2 has an extra member compare to file 1."
That's not going to work. It is possible to define the same struct in different translation units but the definitions need to be identical. Use different names for StructFileInfo and StructStatus.