CCS/MSP430FR5994: Assign a fixed address for an array variable in FRAM

Tool/software: Code Composer Studio

Hi, 

I am playing with the example code of BOOSTXL-AUDIO_430BOOST-SHARPLCD_FFT_FIR_LEA_MSP430FR5994 in CCS. I want to define a new array to log the result of FFT in FRAM. I need to read the memory out by UniFlash later when the experiment is done, so I must assign a fixed address to the variable "FFT_result".

#pragma LOCATION(FFT_result, 0x149cc);
#pragma PERSISTENT(FFT_result);
uint16_t FFT_result[100] = {0};
uint16_t Counter = 0;

However, the FFT_result array can not be written. I even tried "FFT_result[Counter++] = 1" and the array still kept unchanged(I watched it by entering CCS debug mode). Then I tried to remove the address-assign line "#pragma LOCATION(FFT_result, 0x149cc);"  then it works fine. The FFT_result  array can be re-written. I know there is an MPU(FRAM memory protection unit) setting which I have to uncheck. I have already unchecked it. And as I mentioned, when I remove the address-assign line "#pragma LOCATION(FFT_result, 0x149cc);", the FFT_result can be re-written. So the MPU should not be the reason here. 

Do you have any idea what causes this issue? Is it because the address "0x149cc" is not right? I also tried "0x10000" and it does not work either.

Thanks,

Yubo