This way you will pinpoint the issue either with:
Incorrect CPU selection, Reset selection or debug clock may prevent you from establishing a debug session. Check topics How to configure general CPU settings in the category Getting started.
SFR database holds various information, including how winIDEA should connect to the MCU. This information may be winIDEA version dependent, which is why matching SFR database should always be used.
Refer to the SFR Selection chapter of winIDEA Help for more information about controlling the SFR database location and behavior.
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