Hi, Kien,
As the following screenshot, I can succeed to download the example code BitIO, but I use CodeWarrior for mcu ver11.
From the error message, you can succeed to erase the MC56F84789, it means that JTAG interface works fine, the JTAG part connection is okay. Your error message says that BitIO file can not open, Frankly speaking, I do not know if the file exists or not.
Can you succeed compile the example project and generate the *.elf file?
BTW, if you do not use the example, you create a new project and compile it based on CW for mcu ver10.6, can you download/debug a new project?
BR
Xiangjun Rong
