Cause: The information in this file is inconsistent with information from the control file. See accompanying message for reason.
Action: Make certain that the database files and control files are the correct files for this database.
---要保证对于这个数据库的数据库文件及控制文件是正确的,不然的话,就会报这个错误了
ORA-01251 Unknown File Header Version read for file number string
Cause: Read of the file header returned a record but its version cannot be identified. Either the header has been corrupted, or the file is not a valid database file.
你的数据库文件损坏了
Action: Have the operating system make the correct file available to the database, or recover the file.