Nucleo F401RE no startup


I downloaded and extracted the '' and 'extracted the' over it. Building the GPIO_IOToggle (NUCLEO-F401RE board) with MKD-ARM is 100% okay with no errors or warnings. After download with the IDE download settings set to reset-and-run the application starts as the led goes on but it stays on while the program hangs in HAL_Delay(100); If I replace it with a for-loop delay all works fine. Also if I reset the board with the HAL_Delay(100) in it it starts to blink. I wonder why the application hangs in HAL_Delay(100) after download?


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