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Error: Download verification failed

Associate II


i am using STM32H745BIT6, i am using a st-link v2. i was able to debug until Friday but suddenly it stopped and gives me this error.

STMicroelectronics ST-LINK GDB server. Version 7.0.0

Copyright (c) 2022, STMicroelectronics. All rights reserved.

Starting server with the following options:

    Persistent Mode      : Disabled

    Logging Level       : 1

    Listen Port Number     : 61234

    Status Refresh Delay    : 15s

    Verbose Mode        : Disabled

    SWD Debug         : Enabled

    InitWhile         : Enabled

Waiting for debugger connection...

Debugger connected

Waiting for debugger connection...

Debugger connected

Waiting for debugger connection...


            STM32CubeProgrammer v2.11.0-RC1          


Log output file:  C:\Users\FMOHAM~1\AppData\Local\Temp\STM32CubeProgrammer_a43060.log

ST-LINK SN : 30FF6F065647373734141043


Board    : --

Voltage   : 2.56V

SWD freq  : 4000 KHz

Connect mode: Under Reset

Reset mode : Hardware reset

Device ID  : 0x450

Revision ID : Rev V

Device name : STM32H7xx

Flash size : 2 MBytes

Device type : MCU

Device CPU : Cortex-M7/M4

BL Version : 0x90

Memory Programming ...

Opening and parsing file: ST-LINK_GDB_server_a43060.srec

 File     : ST-LINK_GDB_server_a43060.srec

 Size     : 7.86 KB 

 Address    : 0x08000000 

Erasing memory corresponding to segment 0:

Erasing internal memory sector 0

Download in Progress:

File download complete

Time elapsed during download operation: 00:00:04.169

Verifying ...

Error: Data mismatch found at address 0x08000000 (byte = 0xFF instead of 0x00)

Error: Download verification failed

(Read)Failed determine breakpoint type

Shutting down...


i check the wiring and even got a new blaster but still same.

i am using stm32ide.


Even I am facing the same error dont know where the problem is... ?

Is it a debugger problem or a software problem any pointers ?