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CCS/LAUNCHXL-CC1350: CC1350 printf is not working

Part Number: LAUNCHXL-CC1350
Other Parts Discussed in Thread: CC1350

Tool/software: Code Composer Studio

I am learning CC1350 Launchpad examples. I found one example "rfPacketRx_CC1350xxxxx.........nortos_ccs" .

My questions is, how to enable debug prints?   

1.  UART_write() is working. 

2.  printf() - never prints anything

3   System_printf() gives below errors

How System_printf is different from printf? I almost checked all thread related to this question. But none of the solution is working for me.