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JTAG ICE-1000 Question

Hi, Everyone.

My problem is the following. There is a PCB with dsp BF-606 and ADC AD7817. I developed a simple code to get temperature from AD7817 and declare a variable to count errors in case if I get 0 or 0xff from adc (assume it adcErr). If adcErr equals 0  or 0xff the LED on PCB goes red. After compiling and loading the code I pressed F5 to start it and everything goes well (LED is green), when I try to check values from AD7817 (press Shift+F5 periodically) randomly data from adc corrupted and LED goes red. What could be the problem? Is it related to ICE-1000 debbuger?