CCS/TMS570LS0432: Implementing a Bootloader, after call to Fapi_issueProgrammingCommand() FMSTAT indicates that a sector is locked.

Tool/software: Code Composer Studio

I am implementing a Bootloader based on QJ Wang's boot_uart example. After call to Fapi_issueProgrammingCommand() FMSTAT indicates that a sector is locked.

uint32_t Fapi_BlockProgram( uint32_t Bank, uint32_t Flash_Start_Address, uint32_t Data_Start_Address, uint32_t Size_In_Bytes)
{
    register uint32_t src = Data_Start_Address;
    register uint32_t dst = Flash_Start_Address;
    register uint32_t bytes_remain = Size_In_Bytes;
    uint8_t  i, ucBank;
    uint32_t status;
    uint32_t bytes;
    uint32_t Freq_In_MHz;
    uint32_t uwTemp = 0;

    Freq_In_MHz = SYS_CLK_FREQ;

    if (Size_In_Bytes < 16)
        bytes = Size_In_Bytes;
    else
        bytes = 16;

    for (i = 0; i < NUMBEROFSECTORS-1; i++){
        if (Flash_Start_Address < (uint32_t)(flash_sector[i+1].start))
        {
            ucBank     = flash_sector[i].bankNumber;
            break;
        }
    }

    if(( Flash_Start_Address == APP_START_ADDRESS ) || ( ucBank == 1 )){
        Fapi_initializeFlashBanks(Freq_In_MHz); /* used for API Rev2.01 */

        Fapi_setActiveFlashBank((Fapi_FlashBankType)ucBank);

        Fapi_enableMainBankSectors(0xFF);        /* used for API 2.01*/

        while( FAPI_CHECK_FSM_READY_BUSY != Fapi_Status_FsmReady );
        while( FAPI_GET_FSM_STATUS != Fapi_Status_Success );
    }

    while( bytes_remain > 0)
    {
         uwTemp = Fapi_issueProgrammingCommand((uint32_t *)dst,    // dst = 0x00020000
                                              (uint8_t *)src,                                                        // src = 0x080030B8
                                              (uint32_t) bytes,                                                    // bytes = 16
                                              0,
                                              0,
                                              Fapi_AutoEccGeneration);
        if (uwTemp != Fapi_Status_Success)
        {
            return uwTemp;
        }

         while( FAPI_CHECK_FSM_READY_BUSY == Fapi_Status_FsmBusy );

         while(FAPI_GET_FSM_STATUS != Fapi_Status_Success)
         {
             uwTemp = FAPI_GET_FSM_STATUS;

// hangs here as uwTemp is 0x00000011
// bit 0 indicates that the sector is locked.
         }

        src += bytes;   //Size_In_Bytes;
        dst += bytes; //Size_In_Bytes;
        bytes_remain -= bytes; //Size_In_Bytes;
        if ( bytes_remain < 16){
           bytes = bytes_remain;
        }
    }

#ifdef DEBUG_MSG_L3
        UART_putString(UART, "\r Programmed the flash: ");
        UART_send32BitData(UART, Size_In_Bytes);
        UART_putString(UART, "   Bytes. \r ");
#endif
    status =  Flash_Program_Check(Flash_Start_Address, Data_Start_Address, Size_In_Bytes);

    return (status);
}

Your advice is much appreciated.

        ken