Hola buenos días espero y me puedan ayudar con esto todo el día intente con diferentes versiones de flashtool y sigue igual, me da el mismo error.
16/024/2017 04:24:07 - INFO - Flashtool Version 0.9.23.1 built on 11-01-2017 15:12:00
16/024/2017 04:24:07 - INFO - Executing search strategies to find proxy selector
16/024/2017 04:24:11 - INFO - No proxy found for IE. Trying next one
16/024/2017 04:24:11 - INFO - Strategy firefox failed trying next one : No Firefox installation found
16/024/2017 04:24:11 - INFO - No proxy found for java. Trying next one
16/024/2017 04:24:13 - INFO - Syncing devices from github
16/024/2017 04:24:14 - INFO - Opening devices repository.
16/024/2017 04:24:15 - INFO - Scanning devices folder for changes.
16/025/2017 04:25:04 - INFO - Pulling changes from github.
16/025/2017 04:25:06 - INFO - Quietly closing devices repository.
16/025/2017 04:25:06 - INFO - Devices sync finished.
16/025/2017 04:25:06 - INFO - Loading devices database
16/025/2017 04:25:07 - INFO - Loaded 94 devices
16/025/2017 04:25:07 - INFO - Starting phone detection
16/025/2017 04:25:17 - INFO - Device disconnected
16/026/2017 04:26:58 - INFO - Selected Bundle for Sony Xperia XZ(F8331). FW release : 39.2.A.0.386_R5C. Customization : Latin America Generic_1305-5171
16/026/2017 04:26:58 - INFO - Preparing files for flashing
16/029/2017 04:29:42 - INFO - Please connect your device into flashmode.
16/030/2017 04:30:00 - INFO - Device connected in flash mode
16/030/2017 04:30:01 - INFO - Opening device for R/W
16/030/2017 04:30:02 - INFO - Start Flashing
16/030/2017 04:30:02 - INFO - No loader in the bundle. Searching for one
16/030/2017 04:30:10 - INFO - No matching loader found
16/030/2017 04:30:11 - WARN - No loader found or set manually. Skipping loader
16/030/2017 04:30:11 - INFO - Ending flash session
16/030/2017 04:30:11 - ERROR - null
16/030/2017 04:30:11 - ERROR - Error flashing. Aborted
16/030/2017 04:30:11 - INFO - Device connected in flash mode
16/030/2017 04:30:22 - INFO - Device disconnected
Gracias de ante mano !!!!