ORA-41009: Session with session number string, serial number string does not exist
Cause: An attempt to migrate was made, which failed because of invalid session number and/or serial number.
Action: Check the session number and serial number and try again.
ORA-41009错误是由Oracle数据库引擎返回的错误。ORA-41009意味着会话号和序列号无效，会话不存在。
ORA-41009:session number {string}, serial number {string} does not exist
Cause: Attempt was made to execute an operation on a session with a session number and serial number that does not exist.
Action: Ensure that the session number and serial number is valid.
出现ORA-41009错误，有可能是用户在使用连接字符串连接到数据库时，连接字符串中会话号或序列号可能无效或不正确。
根据ORA-41009错误消息，首先应该确认会话号与序列号的提供是正确的，确认后以正确的会话号和序列号重新连接到数据库即可解决ORA-41009错误。