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Jump from custom bootloader to application

Hello, I am trying to build  a custom bootloader which is jumping in the application. In order to do this in a first approach, i wrote a Bootloder which jumps as follows:

For the application I changed the VET_TAB_OFFSET to 0x000A0000UL.

In Keil Settings Target I changed the Read/only Memory Areas:

IROM1 : Start 0x80A000 Size 0x60000

In the Target Options I unchecked Use Memory Layout from Target Dialog

For R/O Base I put 0x080A0000

My scatter file for the application:

For the Bootloader

I use Keil with the MDK Plus Toolchain on the STM32H753.

I do the jump on the bootloader as follows and nothing happens:

What could be the reason?

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