Hi @Vignesh_S
Please tell us which detail RT chip and board you are using?
Do you test the SDK code, whether it works or not?
Do you use the JTAG or the SWD? As the chip is using SWD interface in default.
You may also mentione the EVK JTAG, please note, if you use the external debugger, you need to remove the jump which connect to the on board CMSIS DAP debugger, otherwise, it will have conflict, thanks. More details, please check your used board schematic.
Best Regards,
Kerry