Error Messages 
In the Kernel user menu, you can display the kernel error log.
Procedure
Open the Database Assistant (transaction DB50) or the liveCache Assistant (transaction LC10). Choose 
Problem Analysis 
Messages Kernel Errors 
.
The messages display is a component of the DBA Cockpit and can therefore also be called as follows:
Open DBA Cockpit (transaction DBACOCKPIT).
The display options in DBA Cockpit vary depending on which SAP NetWeaver release you are using.
Choose
Diagnosis Messages Kernel Messages Error Messages .SAP NetWeaver 7.1: Choose
Diagnosis Kernel Messages Errors .
Result
The error log, knldiag.err, is displayed.
The error log records all of the database kernel’s error messages and warnings since the database system was installed. This file is written continuously.
You can use the navigation help (Start of File, End of File) for orientation within the message files.
Choose Import Message File to update the output.