DMA receive gives Buffer over run error in UART receive

Hi ,

 I am using MSP430F6438. I am implementing UART through DMA. In this while receiving through DMA the uart buffer overrun error occurs, i checked in debugger, the UCOE and UCRXERR bits are set. My code as follows

                DMA1CTL &= ~DMAEN; 
                  
                DMACTL0 = DMA1TSEL_16;    
              
                DMA1CTL |= DMADT_0; 
           
                DMA1CTL |= DMADSTINCR_3;   
                      
                DMA1CTL |= DMASBDB;    
            
                DMA1SZ = buf_ptr->szBuf;    //size
               
                DMA1SA = (uint32_t)&uartRegister0->rxbuf;
              
                DMA1DA = (uint32_t)buf_ptr->txrxbuf_ptr;  //buffer to store the received data
                     
                DMA1CTL = DMAIE;  
                    
                DMA1CTL &= ~DMAIFG;
                     
                DMA1CTL |= DMAEN;   

in DMA registers the destination address also not increased. can anyone guide me. I am using for transfer DMA0 channel for receiving DMA1 channel, and i am try to to read the data which is send by the DMA0 using loop back concept.

It reads the last byte i.e if suppose i am sending {5,3,4} meane it takes 4 as las byte position but before that FF only it gets. But the trigger happens properly and DMASZ also decrements per trigger.

 can anyone please guide me

Thanks in advance