Hallo Miriam,
dieser Fehler kann mehrere Ursachen haben, hier dazu einige Infos:
For example, ORA-03113 could be signaled for any of these scenarios:
Server machine crashed
Your server process was killed at O/S level
Network problems
Oracle internal errors / aborts on the server
Client incorrectly handling multiple connections
etc… etc… etc… - a lot of possible causes !!
It goes on to note that the ORA-03113 End-Of-File error often has additional messages:
It is common for this error to be accompanied by other errors such as:
ORA-01041 internal error. hostdef extension doesn’t exist
ORA-03114 not connected to ORACLE
ORA-01012 not logged on
Oracle support will likely need more information to determine what caused the error.
The most useful items are:
Does this occur when trying to (a) make a connection to the database or
(b) on an established connection ?
Check for a trace file from the failed session in USER_DUMP_DEST and BACKGROUND_DMP_DEST directories.
Does a particular statement reproduce this problem or is it random ? Use SQL_TRACE on the session to find the problem statement.