[Xperia Z1 Q&A, Help & Troubleshooting] LMM:
I was trying to upgrade to lollipop using the flashtools program and the firmware downloaded with Xperiafirm, installed all the drivers from drivers folder after Ininstalled the flashatool program.

When I try to flash it, the program gives me this error:

Selected Bundle for Sony Xperia Z1 (C6943). FW release : R3D. Customization : C6943_Claro AR_1277-1243_14.5.A.0.242_R3D

19/033/2015 00:33:46 - INFO - Preparing files for flashing

19/035/2015 00:35:39 - INFO - Please connect your device into flashmode.

19/036/2015 00:36:06 - INFO - Device connected in flash mode

19/036/2015 00:36:06 - INFO - Opening device for R/W

19/036/2015 00:36:07 - INFO - Reading device information

19/036/2015 00:36:07 - INFO - Phone ready for flashmode operations.

19/036/2015 00:36:08 - INFO - Current device : C6943 - BH9001WX07 - 1276-7099_R5C - 1276-7340_14.5.A.0.242 - DTV-LTE_14.4.A.0.157

19/036/2015 00:36:08 - INFO - Start Flashing

19/036/2015 00:36:08 - INFO - Processing loader.sin

19/036/2015 00:36:08 - INFO - Checking header

19/036/2015 00:36:08 - INFO - Flashing data

19/036/2015 00:36:08 - INFO - Processing of loader.sin finished.

19/036/2015 00:36:08 - INFO - Loader : S1_Root_6732 - Version : LOADER_RELEASE_MSM8974_32_AID_4 / Boot version : S1_Boot_MSM8974_Rhine1.3_LA1.04_11 / Bootloader status : ROOTABLE

19/036/2015 00:36:08 - INFO - Disabling final data verification check

19/036/2015 00:36:09 - INFO - Processing partition-image.sin

19/036/2015 00:36:09 - INFO - Checking header

19/036/2015 00:36:09 - INFO - Flashing data

19/036/2015 00:36:09 - INFO - Processing of partition-image.sin finished.

19/036/2015 00:36:09 - INFO - Parsing boot delivery

19/036/2015 00:36:09 - INFO - Phone boot version : S1_Boot_MSM8974_Rhine1.3_LA1.04_11. Boot delivery version : S1_Boot_MSM8974_Rhine1.3_LA1.04_11

19/036/2015 00:36:09 - INFO - Boot delivery up to date. Nothing to do

19/036/2015 00:36:09 - INFO - Processing kernel.sin

19/036/2015 00:36:09 - INFO - Checking header

19/036/2015 00:36:09 - INFO - Flashing data

19/036/2015 00:36:10 - INFO - Processing of kernel.sin finished.

19/036/2015 00:36:10 - INFO - Processing rpm.sin

19/036/2015 00:36:10 - INFO - Checking header

19/036/2015 00:36:10 - INFO - Flashing data

19/036/2015 00:36:10 - INFO - Processing of rpm.sin finished.

19/036/2015 00:36:10 - INFO - Processing fotakernel.sin

19/036/2015 00:36:10 - INFO - Checking header

19/036/2015 00:36:10 - INFO - Flashing data

19/036/2015 00:36:11 - INFO - Processing of fotakernel.sin finished.

19/036/2015 00:36:11 - INFO - Processing amss_fs_2.sin

19/036/2015 00:36:11 - INFO - Checking header

19/036/2015 00:36:11 - INFO - Flashing data

19/036/2015 00:36:11 - INFO - Processing of amss_fs_2.sin finished.

19/036/2015 00:36:11 - INFO - Processing amss_fs_1.sin

19/036/2015 00:36:11 - INFO - Checking header

19/036/2015 00:36:11 - INFO - Flashing data

19/036/2015 00:36:11 - INFO - Processing of amss_fs_1.sin finished.

19/036/2015 00:36:11 - INFO - Processing amss_fsg.sin

19/036/2015 00:36:11 - INFO - Checking header

19/036/2015 00:36:11 - INFO - Flashing data

19/036/2015 00:36:11 - INFO - Processing of amss_fsg.sin finished.

19/036/2015 00:36:11 - INFO - Ending flash session

19/036/2015 00:36:11 - ERROR -

19/036/2015 00:36:11 - ERROR - Error flashing. Aborted

19/036/2015 00:36:12 - INFO - Device disconnected

When this occured, my Z1 stucked in boot loop with sony logo.

Already tried to install Kit Kat, but the same problem happens.

Tried to Repair the phone withn Sony PC Companion, but the program say there is no software for my phone, even after the software downloaded the firmware.

How can I solve this problem now??

Thx in advance.