Hi quian,
Could you please provide more information about your case?
For example:
Which version of LIN_Stack driver you use?
Which Diagnostic class you use?
Diagnostic class II and III uses transport layer, did you include it into your project?
Which hardware/software is used on master side (what is your LIN bus topology)?
Could you please provide your LDF, NPF and CDD files, that we could reproduce it?
Have a great day,
RadekS