Hi yanping_yao
for this error one can refer to MX8X_DDR_Tools_quickstart_guide.pdf
https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8-8X-Family-DDR-Tools-Release/ta-p/...
NOTE: Before using the DDR tools on a new custom board, the user should properly port the
SCU Firmware (SCFW) to this new board. The DDR tools will not be able to run without a properly ported and working SCFW.
NOTE: Please read the MX8_DDR_Tool_User_Guide inside the package carefully before you use this tool.
p.2,3
"DCD CFG file: This format is the configuration file used specifically by the SCU Firmware (SCFW).
In this scenario, the user copies the contents in this work sheet tab and pastes it to a text file, naming
the document with the “.cfg” file extension and placing this file in the appropriate SCFW board file directory..
DCD CFG file format contains pre-processor DEFINE directives used specifically by the SCFW."
Best regards
igor