Launch pad error

Using lauch pad i tried flashing the device but no use the below error gets popped up.

at MSP432_Factory_Reset()CS_DAP_0: Trouble Writing Register DP_RESET: (Error -615 @ 0x2) The target failed to see a correctly formatted SWD header. The connection to the target may be unreliable. Try lowering the TCLK setting before trying again. (Emulation package 6.0.407.3) 

MSP432_Factory_Reset() cannot be evaluated.
Target failed to write register DP_RESET
at DP_RESET=1 [msp432_factory_reset.gel:44]
at MSP432_Factory_Reset()