Thanks.

We just need to restore the database back to 6:59PM. any data loss after 6:59 will be ok.

Thanks but still no luck....no open transactions ...restarting the server doesn't help either. And the same result to restore to a different database.

Thanks but same error.

DBCC CheckDB result is good. But I want to know why that error happened. I tried 10 times and every time that error happened. There are no other users connected...