Hello @seanwu ,
Thanks for your post.
I've indeed reproduced your problem. The cause is that it lacks the default flash driver settings. I'll submit a Jira ticket to the SDK team.
You can solve it in this way.
Manually add the "MCXNxx.cfx" file in the GUI flash tool, and then you can download it normally, but it's only effective for a single time.


If you want to set the default flash driver for it, you can do it in the following way.

If this works, then even if you don't set the GUI flash driver, it should also work.
Hope it can help you.
BRs,
Celeste
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