TMS320F280049C: Fapi_issueProgrammingCommand always produces FMSTAT INVDAT to be 1

Hi,

I'm trying to use the flash API and try to program FLASH but it always returns failure. From the manual the INVDAT will be set if I'm trying to write 0 to 1 in flash. Before I write to FLASH I have erased the flash (also checked with functions everything is OK and with memory browser that is is all 0xFFFF) but it doesn't help. What am I doing wrong?

Here is some code how am I trying to do it:

uint32_t addressToErase = 0x8F000;
uint16_t data[4];
data[0] = 0x10;
data[1] = 0x11;
data[2] = 0x12;
data[3] = 0x13;

Fapi_StatusType flashStatus = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector, (uint32_t *)addressToErase);
while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady);
if (flashStatus != 0)
{
    // Handle error
}
else
{
     if (Fapi_getFsmStatus() != 0u)
     {
         // Handle error
     }
     else
     {
        // Check if blank
        Fapi_FlashStatusWordType flashStatusWord;
        flashStatus = Fapi_doBlankCheck((uint32_t *)addressToErase, 0x1000, &flashStatusWord);
        if (flashStatus != Fapi_Status_Success)
        {
            // Handle error
        }
        else
        {
            flashStatus = Fapi_issueProgrammingCommand(&addressToErase, &data[0], 4, NULL, 0u, Fapi_AutoEccGeneration);
            // Wait until the Flash program operation is over
            while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady);
            if (flashStatus != Fapi_Status_Success)
            {
                Will always come here because INVDAT is 1
                // Handle error
            }
            ....

        }
     }
}