my USB CDC IF File was deleted by code automatically without asking

[Laksahan]

I don't know we are going where with this software. after update i was tried some pin name changes and pressed generate code.. and my USB CDC IF file gone.. with my codes.. how do i trust this software.. where do we go.. and now no where to config usb cdc and nothing work instead no usb descriptor error. how to recover? can i go back to old version? why is this software like this?

[TDK]

Please don't repost.

Normal USB CDC Cannot Define after update. - STMicroelectronics Community

While this may not be the exact same issue, it's clearly heavily related and should be in the same thread.

[Tesla DeLorean]

You might try recovering older instances of a file via File Manager

[Pavel A.]

If you have a Windows machine, you can use the Quick Assist app to request help from a remote expert.

Do you remember which version of CubeMX or IDE or libraries you had before update?

[Bob S]

I know this is not any help for your current situation, but for the future:

• Don't trust any code generator tool
• Use version control ("git" is free an commonly used, and on Windows comes with a GUI interface as well as command line)
• Always back up your files (i.e. commit to the version control repository) before you update any tools or re-generate any code
• Back up your version control repo (clone to GitHub, GitLab, etc. web sites if your company policy allows, else copy to a networked or USB drive.

[Karl Yamashita]

Been there, done that. 1 hour of coding in main.c and generating code, then the program crashed. Puff, main.c file was gone.

So now you know what could possibly happen when writing your code within ST's file. Lesson learned. So moving forward, you train yourself to write your code in your own files that ST code generation tool can't touch.