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AWR1642: Image loading failed: Not able to connect to serial port. Recheck COM port selected and/or permissions.

Part Number: AWR1642
Other Parts Discussed in Thread: UNIFLASH, TIDA-020004,

Hi

I designed a board based on the TIDA-020004 reference design and I can't program the board using the UniFlash getting this error:

Image loading failed: Not able to connect to serial port. Recheck COM port selected and/or permissions.

Board is in programming mode by installing the jumper on J3 and I'm using a PL2303TA USB to TTL Serial Cable to connect the board to the PC. COM port number from the device manager has been entered in the UniFlash. Also, I checked all the voltage nodes on the board and all of them are ok. Please help me.

Thanks in advance