while launching new project, libraries file does not exist

[MÇETİ.1]

Hi everyone, I'm tryin to learn how to use stm32f4 boards. But I have a problem when I create new project libraries file doesn't exist as it was. I did not see problem like this before while using stm32f1xx series, and also there is a warning like this. Please help me

[mattias norlander]

Looks like you are using TrueSTUDIO. Not STM32CubeIDE right?

The warning you see is because the local varliable data is not used in this function. Not necessarily a problem when executing the example. More a remark that the code could be improved...

I don't understand what you mean with:

"But I have a problem when I create new project libraries file doesn't exist as it was. I did not see problem like this before while using stm32f1xx series".

In your screenshot I don't see any error at all.

[Tesla DeLorean]

Is the variable used or not?

Warnings are there to be informative, in case you missed something, or that the logic eliminates things.

The code may be a hold over from a prior iteration, or be there for a different build option, we other code is taken or ignored based on a top level define, or build for Debug vs Release.

Learn to differentiate Warnings from Errors

Learn to read/walk Code, and discern intent.