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Flash Download Failed - Cortex M4

Kenya Digit

I reduced my program to the basics in order to test porting to Cortex-M4 / STM32F417VG. The program works, but now I have error Flash Download Failed - Cortex M4. Here is the log.

Contents missmatch at: 08000000H (Flash=FFH Required=58H) !
Contents missmatch at: 08000001H (Flash=FFH Required=04H) !
Contents missmatch at: 08000002H (Flash=FFH Required=00H) !
Contents missmatch at: 08000003H (Flash=FFH Required=20H) !
Contents missmatch at: 08000004H (Flash=FFH Required=9DH) !
Contents missmatch at: 08000005H (Flash=FFH Required=01H) !
Contents missmatch at: 0800001DH (Flash=FFH Required=00H) !
Too many errors to display !

- Where did I go wrong?
- Also should I select device as Cortex-M4 or STM32F417VG
- Where can I add project device profile for STM32F417VG?