flash failed with aborted error!

12/047/2015 00:47:12 - INFO - Flashtool Version 0.9.19.8 built on 24-09-2015 22:00:00
12/047/2015 00:47:12 - INFO - Executing search strategies to find proxy selector
12/047/2015 00:47:13 - INFO - No proxy found for IE. Trying next one
12/047/2015 00:47:13 - INFO - Strategy firefox failed trying next one : No Firefox installation found
12/047/2015 00:47:13 - INFO - No proxy found for java. Trying next one
12/048/2015 00:48:07 - INFO - Syncing devices from github
12/048/2015 00:48:08 - INFO - Scanning devices folder for changes.
12/048/2015 00:48:15 - INFO - Pulling changes from github.
12/048/2015 00:48:16 - INFO - Devices sync finished.
12/048/2015 00:48:21 - INFO - Device connected with USB debugging off
12/048/2015 00:48:21 - INFO - For 2011 devices line, be sure you are not in MTP mode
12/048/2015 00:48:54 - INFO - Flash canceled
12/049/2015 00:49:19 - INFO - Selected Bundle for Sony Xperia Z1 (C6903). FW release : 14.4.A.0.157. Customization : BAL
12/049/2015 00:49:19 - INFO - Preparing files for flashing
12/050/2015 00:50:39 - INFO - Please connect your device into flashmode.
12/050/2015 00:50:47 - INFO - Device disconnected
12/051/2015 00:51:00 - INFO - Device connected in flash mode
12/051/2015 00:51:01 - INFO - Opening device for R/W
12/051/2015 00:51:01 - INFO - Reading device information
12/051/2015 00:51:01 - INFO - Phone ready for flashmode operations.
12/051/2015 00:51:01 - INFO - Opening TA partition 2
12/051/2015 00:51:01 - INFO - Current device : Unknown: Feb 21 2014/16:15:56 - BH900R0U0D - Unknown: Feb 21 2014/16:15:56 - Unknown: Feb 21 2014/16:15:56 - Unknown: Feb 21 2014/16:15:56
12/051/2015 00:51:01 - INFO - Closing TA partition
12/051/2015 00:51:01 - INFO - Start Flashing
12/051/2015 00:51:01 - INFO - Processing loader.sin
12/051/2015 00:51:01 - INFO - Checking header
12/051/2015 00:51:01 - INFO - Flashing data
12/051/2015 00:51:01 - INFO - Loader : S1_Root_6732 - Version : LOADER_RELEASE_MSM8974_28_AID_4 / Boot version : S1_Boot_MSM8974_Rhine1.2_LA1.04_19 / Bootloader status : ROOTED
12/051/2015 00:51:01 - INFO - Max packet size set to 512K
12/051/2015 00:51:05 - INFO - Making a TA backup
12/051/2015 00:51:05 - INFO - Opening TA partition 1
12/051/2015 00:51:05 - INFO - Start Dumping TA partition 1
12/051/2015 00:51:05 - INFO - Finished Dumping TA partition 1
12/051/2015 00:51:06 - INFO - TA partition 1 saved to C:\Flashtool\registeredDevices\BH900R0U0D\s1ta1 5-10-11_12-51-05.ta
12/051/2015 00:51:06 - INFO - Closing TA partition
12/051/2015 00:51:06 - INFO - Opening TA partition 2
12/051/2015 00:51:06 - INFO - Start Dumping TA partition 2
12/051/2015 00:51:06 - INFO - Finished Dumping TA partition 2
12/051/2015 00:51:06 - INFO - TA partition 2 saved to C:\Flashtool\registeredDevices\BH900R0U0D\s1ta1 5-10-11_12-51-05.ta
12/051/2015 00:51:06 - INFO - Closing TA partition
12/051/2015 00:51:06 - INFO - Parsing boot delivery
12/051/2015 00:51:07 - INFO - Ending flash session
12/051/2015 00:51:07 - ERROR -
12/051/2015 00:51:07 - ERROR - Error flashing. Aborted
12/051/2015 00:51:08 - INFO - Device connected in flash mode
12/051/2015 00:51:08 - INFO - Device disconnected
12/051/2015 00:51:11 - INFO - Device connected in flash mode


I would like to flash back to official ftf

Why aborted,how can I do now?!
I have already install all of drivers but no work,
I uninstall and install again and again ,still no work