Problem Patching WebAS 6.40 SP9 to SP15

Hello everybody,

I have Windows XP Professional SP2 German with j2sdk1.4.2_09 and I was applying the SP15 until the step 8 where this error occurred:

ERROR 2006-02-14 19:22:43

MUT-02041 SDM call of deploySdaList ends with returncode 4. See output of logfile C:\Programme\sapinst_instdir\PATCH\ADA\callSdmViaSapinst.log.

Feb 14, 2006 7:22:42 PM Info: E R R O R ******* (DbModificationManager)

Feb 14, 2006 7:22:42 PM Info: 19:22:42 2006-02-14 dbs-Error: Tabelle J2EE_CONFIGENTRY: Umsetzung momentan nicht moeglich

Aborted: development component 'com.sap.engine.jddischema'/'sap.com'/'SAP AG'/'6.4015.00.0000.20051123133827.0000':

Some ideas what this could be?

Thanks in advance

Abel