F500L Flashing Issues

[.:SUBRATA:.]

Hello Team

I m having issues with F500L, during flash having this particular error

--------------------------------------------------------------------------------
Platform: LG Qualcomm
Selected port: COM20
Selected model: F500L
Reading info...
Model ID: LG-F500L
IMEI: 357767-06-058545-5
Android version: 6.0
Battery level: 90%
SW Version: F500L21a
Mode: Emergency
Initializing flash...OK
SW version: LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0
Android version: 6.0
LAF Version: 1.1
Product ID: SM07S160105000215
IMEI: 357767-06-058545-5
Target operator: LGU
Hardware: rev_10
Performed by 2.6.1 Software version.
--------------------------------------------------------------------------------
Checking data...OK
Platform: LG Qualcomm
Selected port: COM20
Selected model: F500L
Reading info...
Model ID: LG-F500L
IMEI: 357767-06-058545-5
Android version: 6.0
Battery level: 90%
SW Version: F500L21a
Mode: Emergency
Initializing flash...OK
SW version: LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0
Android version: 6.0
LAF Version: 1.1
Product ID: SM07S160105000215
IMEI: 357767-06-058545-5
Target operator: LGU
Hardware: rev_10
Opening "LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0.tot"...OK
Firmware version: F500L21a
Firmware model: LG-F500L
--------------------------------------------------------------------------------
Writing phone firmware without real necessity is at your own risk.

Downgrade may lead to phone damage!

Please, make sure the phone's battery is fully charged.
Disconnect all other devices from the computer (including phones, modems, etc.) and close all other running programs.
To avoid errors in the flashing process, use a clean PC (without any installed drivers for other Qualcomm-based devices).
You should not run any other programs or attach new devices to your computer during the flashing!
--------------------------------------------------------------------------------
Prepairing firmware...OK
Setting options...OK
Reading partitions...OK
Formating USERDATA...OK
Formating ENCRYPT...OK
Writing 1/28 PrimaryGPT...Failed!
Performed by 2.6.1 Software version.
--------------------------------------------------------------------------------
Checking data...OK
Platform: LG Qualcomm
Selected port: COM20
Selected model: F500L
Reading info...
Model ID: LG-F500L
IMEI: 357767-06-058545-5
Android version: 6.0
Battery level: 91%
SW Version: F500L21a
Mode: Emergency
Initializing flash...OK
SW version: LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0
Android version: 6.0
LAF Version: 1.1
Product ID: SM07S160105000215
IMEI: 357767-06-058545-5
Target operator: LGU
Hardware: rev_10
Opening "LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0.tot"...OK
Firmware version: F500L21a
Firmware model: LG-F500L
--------------------------------------------------------------------------------
Writing phone firmware without real necessity is at your own risk.

Downgrade may lead to phone damage!

Please, make sure the phone's battery is fully charged.
Disconnect all other devices from the computer (including phones, modems, etc.) and close all other running programs.
To avoid errors in the flashing process, use a clean PC (without any installed drivers for other Qualcomm-based devices).
You should not run any other programs or attach new devices to your computer during the flashing!
--------------------------------------------------------------------------------
Prepairing firmware...OK
Setting options...OK
Reading partitions...OK
Formating USERDATA...OK
Formating ENCRYPT...OK
Writing 1/28 PrimaryGPT...Failed!
Performed by 2.6.1 Software version.

F500L20C_00
LGF500LAT-00-V21a-LGU-KR-DEC-16-2016+0

Phone was running with PIN Lock, i tried reset screen lock options of Octopus , but nothing

Regards