Debugging in e2 studio

Hello there,

I'm a new beginner with Renesas platform. I'm currently working with RL78 family G1F (R5F11BBC) as target. while trying to flash the code with the E2 lite emulator to enter a debug session, i frequently face the problem that say " GDB action 'connect to target', has failed with error code, 0xffffffff
force_kill_gdb()
Disconnected from the Target Debugger. " 

and fail to connect to the target  although there is no error with the wiring. and it sometimes works and sometimes no.

how to deal and manage this issue ?

and can i reset the IDE settings to the default and how? is it works fine when i restart my PC ?  

Thanks in advance