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STM32U545 External Loader "Init Function Fail"

GiBi_01
Visitor

I have an External Loader Project made for STM32G0/G4/L4.

I ported it to STM32U5: all the functions work fine when debugged from STM32CubeIDE (so the connections are ok). With the STM32CubeProgrammer the .stldr file is recognized but the Read/Write/SectoreErase operations fails due to "Init Function fail". 

Any suggestion will be appreciated!

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