Problem of reading FLASH

Hello. Has faced with the following problem: at reading FLASH of memory of the controller since 0x00120000 address (bank 0 sector 12 - 14)

occurs interruption on a vector _dabort

The code is resulted more low:

void main(void)
 {
 /* USER CODE BEGIN (3) */


     volatile unsigned long data;
     volatile unsigned long adr;
     adr = 0x00020000;
     data = *((unsigned long*)adr);

    
     adr = 0x00040000;
     data = *((unsigned long*)adr);


     adr = 0x00060000;
     data = *((unsigned long*)adr);

    
     adr = 0x00080000;
     data = *((unsigned long*)adr);

    
     adr = 0x000A0000;
     data = *((unsigned long*)adr);

    
     adr = 0x000C0000;
     data = *((unsigned long*)adr);    

    
     adr = 0x000E0000;
     data = *((unsigned long*)adr);

    
     adr = 0x00100000;
     data = *((unsigned long*)adr);   



 
    /* Instructions resulted cause interruption at reading more low */ 
     adr = 0x00120000;
     data = *((unsigned long*)adr);

    
     adr = 0x00140000;
     data = *((unsigned long*)adr);    

    
     adr = 0x00160000;
     data = *((unsigned long*)adr);
 /* USER CODE END */
 }