my file is showing this kind of message while opening some one plz help me
Can you upload the file somewhere so we can look at it?
If you are using SketchUp 2023, make sure you’re on the latest version, or you’re using 024. Those had fixes in them that coped with file corruptions.
Where have you been saving the file while working on it? Have you tried renaming the .skb backup copy to .skp to open it?
Your profile says you are using “Free Plan” 2023. Does that mean it’s a cracked version?