sorry to say. still not fixed the root method 
Analyzing file [F:/Samsung File/A515F/A515FXXU3ATC3_OLM3ATC3+for imei/AP_A515FXXU3ATC3_CL17851094_QB29741186_REV00_user_ low_ship_meta_OS10.tar].....OK
Extracting files.....OK
Decompressing LZ4.....OK
Checking output file.....OK
File to process [D:/Software/EFT/boot.img]
Unpacking image.....OK
Checking status.....OK
Patching.....OK
Repacking image.....OK
Saving image.....OK
Rooted image saved to [F:/Samsung File/A515F/A515FXXU3ATC3_OLM3ATC3+for imei/RootedBoot.rEFT]
Analyzing [F:/Samsung File/A515F/A515FXXU3ATC3_OLM3ATC3+for imei/RootedBoot.rEFT].....OK
Searching for Samsung ODIN protocol.....Detected {COM11}
Connecting to device.....OK
Reading PIT.....OK
Flashing [boot.img].....OK
Rebooting device.....OK
Operation {Make Rooted boot} ID: DB228F4CFD9AD93A
Elapsed time 01:17 -- Version 4.2.1