[Sony Xperia T, TL, TX, V] Ritwyk:
I'm trying to flash the stock firmware for my bootloader locked LT30P via Flashtool 0.9.19.8, but it keeps aborting the process while trying to process system.sin. Here's the log:

30/057/2015 14:57:55 - INFO - Flashtool Version 0.9.19.8 built on 24-09-2015 22:00:00
30/057/2015 14:57:55 - INFO - Executing search strategies to find proxy selector
30/057/2015 14:57:56 - INFO - No proxy found for IE. Trying next one
30/057/2015 14:57:56 - INFO - Strategy firefox failed trying next one : No Firefox installation found
30/057/2015 14:57:56 - INFO - No proxy found for java. Trying next one
30/057/2015 14:57:56 - INFO - Syncing devices from github
30/057/2015 14:57:56 - INFO - Scanning devices folder for changes.
30/058/2015 14:58:09 - INFO - Pulling changes from github.
30/058/2015 14:58:10 - INFO - Devices sync finished.
30/058/2015 14:58:14 - INFO - Device disconnected
30/058/2015 14:58:44 - INFO - Selected Bundle for Sony Xperia T (LT30p). FW release : 9.1.A.1.140. Customization : 1268-3194 Central Europe Skyfall
30/058/2015 14:58:44 - INFO - Preparing files for flashing
30/059/2015 14:59:12 - INFO - Please connect your device into flashmode.
30/059/2015 14:59:26 - INFO - Device connected in flash mode
30/059/2015 14:59:27 - INFO - Opening device for R/W
30/059/2015 14:59:27 - INFO - Device connected in flash mode
30/059/2015 14:59:27 - INFO - Reading device information
30/059/2015 14:59:27 - INFO - Phone ready for flashmode operations.
30/059/2015 14:59:27 - INFO - Opening TA partition 2
30/059/2015 14:59:27 - INFO - Current device : LT30p - YT9104B5AS - 1266-0471_R8F - 1262-6309_7.0.A.3.195 - GLOBAL-HSPA_7.0.A.3.195
30/059/2015 14:59:27 - INFO - Closing TA partition
30/059/2015 14:59:27 - INFO - Start Flashing
30/059/2015 14:59:27 - INFO - Processing loader.sin
30/059/2015 14:59:27 - INFO - Checking header
30/059/2015 14:59:27 - INFO - Flashing data
30/059/2015 14:59:28 - INFO - Loader : S1_Root_7054 - Version : R5F001 / Boot version : R10AM001 / Bootloader status : NOT_ROOTABLE
30/059/2015 14:59:28 - INFO - Max packet size set to 64K
30/059/2015 14:59:29 - INFO - Making a TA backup
30/059/2015 14:59:29 - INFO - Opening TA partition 1
30/059/2015 14:59:29 - INFO - Start Dumping TA partition 1
30/059/2015 14:59:33 - INFO - Finished Dumping TA partition 1
30/059/2015 14:59:33 - INFO - TA partition 1 saved to C:\Users\Ritwik\.flashTool\registeredDevices\YT9104B5AS\s1ta\2015-11-30_02-59-29\1.ta
30/059/2015 14:59:33 - INFO - Closing TA partition
30/059/2015 14:59:33 - INFO - Opening TA partition 2
30/059/2015 14:59:34 - INFO - Start Dumping TA partition 2
30/059/2015 14:59:34 - INFO - Finished Dumping TA partition 2
30/059/2015 14:59:34 - INFO - TA partition 2 saved to C:\Users\Ritwik\.flashTool\registeredDevices\YT9104B5AS\s1ta\2015-11-30_02-59-29\2.ta
30/059/2015 14:59:34 - INFO - Closing TA partition
30/059/2015 14:59:35 - INFO - No flash script found. Using 0.9.18 flash engine
30/059/2015 14:59:35 - INFO - Disabling final data verification check
30/059/2015 14:59:35 - INFO - Disabling final verification
30/059/2015 14:59:35 - INFO - Opening TA partition 2
30/059/2015 14:59:35 - INFO - Writing TA unit 00002774. Value : [01]
30/059/2015 14:59:35 - INFO - Closing TA partition
30/059/2015 14:59:35 - INFO - Processing partition-image.sin
30/059/2015 14:59:35 - INFO - Checking header
30/059/2015 14:59:35 - INFO - Flashing data
30/059/2015 14:59:35 - INFO - Opening TA partition 2
30/059/2015 14:59:35 - INFO - Closing TA partition
30/059/2015 14:59:35 - INFO - Opening TA partition 2
30/059/2015 14:59:35 - INFO - Processing amss_fsg.sin
30/059/2015 14:59:35 - INFO - Checking header
30/059/2015 14:59:36 - INFO - Flashing data
30/059/2015 14:59:36 - INFO - Processing amss_fs_1.sin
30/059/2015 14:59:36 - INFO - Checking header
30/059/2015 14:59:36 - INFO - Flashing data
30/059/2015 14:59:36 - INFO - Processing amss_fs_2.sin
30/059/2015 14:59:36 - INFO - Checking header
30/059/2015 14:59:36 - INFO - Flashing data
30/059/2015 14:59:36 - INFO - Processing cache.sin
30/059/2015 14:59:36 - INFO - Checking header
30/059/2015 14:59:37 - INFO - Flashing data
30/059/2015 14:59:38 - INFO - Processing fotakernel.sin
30/059/2015 14:59:38 - INFO - Checking header
30/059/2015 14:59:38 - INFO - Flashing data
30/059/2015 14:59:40 - INFO - Processing kernel.sin
30/059/2015 14:59:40 - INFO - Checking header
30/059/2015 14:59:40 - INFO - Flashing data
30/059/2015 14:59:42 - INFO - Closing TA partition
30/059/2015 14:59:42 - INFO - Opening TA partition 2
30/059/2015 14:59:42 - INFO - Processing system.sin
30/059/2015 14:59:42 - INFO - Checking header
30/059/2015 14:59:43 - ERROR - Processing of system.sin finished with errors.
30/059/2015 14:59:43 - INFO - Ending flash session
30/059/2015 14:59:43 - ERROR -
30/059/2015 14:59:43 - ERROR - Error flashing. Aborted
30/059/2015 14:59:43 - INFO - Flashing finished.
30/059/2015 14:59:43 - INFO - Please unplug and start your phone
30/059/2015 14:59:43 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

The firmware I'm using is LT30p_9.1.A.1.140_1268-3194 Central Europe Skyfall. I can't boot anymore because I keep getting the "yellow-exclamation-mark-in-a-triangle-besides-a-phone" icon.

I tried repairing via Sony PC Companion, but that throws up an error too, reading "There is no update available for your device" (I'm paraphrasing).

Can anyone tell me what I'm doing wrong, or how I can get the phone booting again?