LP-AM263P: LP-AM263P Flashing Issue

Part Number: LP-AM263P
Other Parts Discussed in Thread: UNIFLASH

Hi Team,

I'm using LP-AM263P Launchpad for my project. I'm facing some issue in the flashing. I'm using CCS 12.8.1 version. 

I was using release mode, for the first time I was able to flash the code but, when I tried to flash again I'm getting error mentioned in below picture. Then I changed to Debug mode and flashing was happening first time. But when I tried to re flash agian the error came.
Sometimes, I am able to flash and sometimes facing issue. Could you please let me know the solution for the same? 

Earlier the same code was working without any issue.