Hi Carlos Castillo，
What's the debugger you are using?
You need to select the correct debugger in your debugger configuration, then you can download it.
I think you can create a simple CW project for KL25, and choose the related debugger when you create the project, then generate the code, build the project and download it again.
Please try it.
If you still have questions about it, please kindly let me know.
Kerry
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