Cannot debug project because of Cannot access target error

Dear Sirs and Madams!

I am having problems debuging following code:

void ueInitLCD(void)
{
    // Initialization structures
    I2C_InitTypeDef ueI2C_NCP5623_InitStructure;
    SPI_InitTypeDef ueSPI_DOGM128_InitStruct;
    GPIO_InitTypeDef ueGPIO_DOGM128_I2C_InitStruct;
    GPIO_InitTypeDef ueGPIO_DOGM128_CS_InitStruct;
    GPIO_InitTypeDef ueGPIO_DOGM128_RST_InitStruct;
    GPIO_InitTypeDef ueGPIO_DOGM128_A0_InitStruct;

    // Initialize IC2 Bus
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,
        ENABLE);
    ueI2C_NCP5623_InitStructure.I2C_Mode = I2C_Mode_I2C;
    ueI2C_NCP5623_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
    ueI2C_NCP5623_InitStructure.I2C_OwnAddress1 = 0x70;
    ueI2C_NCP5623_InitStructure.I2C_Ack = I2C_Ack_Enable;
    ueI2C_NCP5623_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    ueI2C_NCP5623_InitStructure.I2C_ClockSpeed = 400000;
    I2C_Cmd(I2C1,
        ENABLE);
    I2C_Init(I2C1,
        &ueI2C_NCP5623_InitStructure);

    // Configure GPIO pins for I2C use
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,
        ENABLE);
    ueGPIO_DOGM128_I2C_InitStruct.GPIO_Pin = UE_PIN_DOGM128_SPI_CLK | UE_PIN_DOGM128_SPI_SI;
    ueGPIO_DOGM128_I2C_InitStruct.GPIO_Mode = GPIO_Mode_AF_OD;
    ueGPIO_DOGM128_I2C_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(UE_PORT_DOGM128_SPI,
        &ueGPIO_DOGM128_I2C_InitStruct);

    // Initialize SPI
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,
        ENABLE);
    ueSPI_DOGM128_InitStruct.SPI_Direction = SPI_Direction_1Line_Tx;
    ueSPI_DOGM128_InitStruct.SPI_Mode = SPI_Mode_Master;
    ueSPI_DOGM128_InitStruct.SPI_DataSize = SPI_DataSize_8b;
    ueSPI_DOGM128_InitStruct.SPI_CPOL = SPI_CPOL_High;
    ueSPI_DOGM128_InitStruct.SPI_CPHA = SPI_CPHA_2Edge;
    ueSPI_DOGM128_InitStruct.SPI_NSS = SPI_NSS_Soft;
    ueSPI_DOGM128_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
    ueSPI_DOGM128_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_Init(UE_PERIPHERAL_DOGM128_SPI,
        &ueSPI_DOGM128_InitStruct);
    SPI_Cmd(UE_PERIPHERAL_DOGM128_SPI,
        ENABLE);

    // Initalize GPIO (CS - Chip Select)  Pin
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,
        ENABLE);
    ueGPIO_DOGM128_CS_InitStruct.GPIO_Pin = UE_PIN_DOGM128_CS;
    ueGPIO_DOGM128_CS_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
    ueGPIO_DOGM128_CS_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(GPIOA,
        &ueGPIO_DOGM128_CS_InitStruct);

    // Initialize GPIO (RST - Reset) Pin
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,
        ENABLE);
    ueGPIO_DOGM128_RST_InitStruct.GPIO_Pin = UE_PIN_DOGM128_RST;
    ueGPIO_DOGM128_RST_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
    ueGPIO_DOGM128_RST_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(GPIOC,
        &ueGPIO_DOGM128_RST_InitStruct);

    // Initialize GPIO (A0) Pin
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,
        ENABLE);
    ueGPIO_DOGM128_A0_InitStruct.GPIO_Pin = UE_PIN_DOGM128_A0;
    ueGPIO_DOGM128_A0_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
    ueGPIO_DOGM128_A0_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(GPIOD,
        &ueGPIO_DOGM128_A0_InitStruct);

    GPIO_WriteBit(UE_PORT_DOGM128_CS,
        UE_PIN_DOGM128_CS,
        Bit_RESET);
    GPIO_WriteBit(UE_PORT_DOGM128_RST,
        UE_PIN_DOGM128_RST,
        Bit_SET);
    GPIO_WriteBit(UE_PORT_DOGM128_RST,
        UE_PIN_DOGM128_RST,
        Bit_RESET);

    lcdSendCommand(lcdInitCmd,
        sizeof(lcdInitCmd));
}   // ueInitLCD

void lcdSendCommand(const char *pcCmd,
    uint8_t ui8Len)
{
    uint16_t index = 0;

    for(index = 0; index < ui8Len; index++)
    {
        SPI1->DR = pcCmd[index];
        while (!(SPI1->SR & SPI_I2S_FLAG_TXE));
        //while (!(SPI1->SR & SPI_I2S_FLAG_RXNE));
        while (SPI1->SR & SPI_I2S_FLAG_BSY);
    }
}   // lcdSendCommand

When I press Ctrl+F5 to debug upper functions, I get following error:

Cannot access Target. Shutting down debug session.

However, I can download compiled code to target board without problems. Why is this happening?