Flash Page Error in Arduino Due while programming on programming port

Hi,

I am using Arduino due in my project. The project has 14 volt battery power supply. The custom board has power supply unit that converts from 14 volts to 5 volts which goes to arduino due Vin pin.

However, most of the time I am getting the following error after which I can not use the Arduino board. Please help me how can we avoid the error. This was my 5th board and do not want to bye once in a week.

I also tried uploading the blink code, but same error. Please find the error below.

Sketch uses 22124 bytes (4%) of program storage space. Maximum is 524288 bytes.
Atmel SMART device 0x285e0a60 found
Erase flash
done in 0.032 seconds

Write 24392 bytes to flash (96 pages)

[ ] 0% (0/96 pages)
Flash page is locked
An error occurred while uploading the sketch