"Read Failed" error occurs in GR IDE

I developed a product that is based on RL78/G13's 20 pin IC, now when I program it using GR KURUMI' IDE I received an error saying "Read failed" but it detects my board

what could be the reason behind it? is there any need for configuration that needs to be done?

I have already replicated GR KURUMI's board and developed my own using 52pin RL78/G13 which was successful.

Error:

F:\REN_ide4gr-1.13-windows_SWR_20200902\ide4gr-1.13/hardware/tools/gcc-rl78/rl78-elf/rl78-elf/lib\libstdc++.a(pure.o): In function `__cxa_pure_virtual':
(.text.__cxa_pure_virtual+0x12): warning: _write is not implemented and will always fail
Binary sketch size: 22,090 bytes (of a 262,144 byte maximum) - 8% used
Minimum Memory usage: 2,648 bytes (of a 20,480 byte maximum) - 12% used
Device: R5F1006C
Code size: 32 kB
Data size: 4 kB
Erase
cygwin warning:
MS-DOS style path detected: C:\Users\KOVARD~1\AppData\Local\Temp\build5485136465074631415.tmp/Blink.cpp.mot
Preferred POSIX equivalent is: /cygdrive/c/Users/KOVARD~1/AppData/Local/Temp/build5485136465074631415.tmp/Blink.cpp.mot
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
cygwin.com/.../using.html
Read failed
................................
Read file "C:\Users\KOVARD~1\AppData\Local\Temp\build5485136465074631415.tmp/Blink.cpp.mot"