Here is the error log,
\DVEBMGS10\j2ee\configtool>configtool
com.sap.engine.frame.core.configuration.ConfigurationException: Error while conn
ecting to DB.
at com.sap.engine.core.configuration.impl.persistence.rdbms.DBConnection
Pool.createConnection(DBConnectionPool.java:370)
at com.sap.engine.core.configuration.impl.persistence.rdbms.DBConnection
Pool.<init>(DBConnectionPool.java:131)
at com.sap.engine.core.configuration.impl.persistence.rdbms.PersistenceH
andler.<init>(PersistenceHandler.java:38)
at com.sap.engine.core.configuration.impl.cache.ConfigurationCache.<init
>(ConfigurationCache.java:149)
at com.sap.engine.core.configuration.bootstrap.ConfigurationManagerBoots
trapImpl.init(ConfigurationManagerBootstrapImpl.java:236)
at com.sap.engine.core.configuration.bootstrap.ConfigurationManagerBoots
trapImpl.<init>(ConfigurationManagerBootstrapImpl.java:49)
at com.sap.engine.configtool.visual.ConfigTool.loadClusterData(ConfigToo
l.java:153)
at com.sap.engine.configtool.visual.ConfigTool.initScan(ConfigTool.java:
135)
at com.sap.engine.configtool.visual.ConfigTool.<init>(ConfigTool.java:12
4)
at com.sap.engine.configtool.visual.ConfigTool.main(ConfigTool.java:1176
)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:331)
at com.sap.engine.offline.OfflineToolStart.main(OfflineToolStart.java:81
)
Caused by: com.sap.sql.log.OpenSQLException: Could not load class oracle.jdbc.dr
iver.OracleDriver.
at com.sap.sql.log.Syslog.createAndLogOpenSQLException(Syslog.java:106)
at com.sap.sql.jdbc.NativeConnectionFactory.createNativeConnection(Nativ
eConnectionFactory.java:143)
at com.sap.sql.connect.OpenSQLDataSourceImpl.createPooledConnection(Open
SQLDataSourceImpl.java:608)
at com.sap.sql.connect.OpenSQLDataSourceImpl.getPooledConnection(OpenSQL
DataSourceImpl.java:285)
at com.sap.engine.core.configuration.impl.persistence.rdbms.DBConnection
Pool.createConnection(DBConnectionPool.java:308)
... 14 more
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at com.sap.engine.offline.FileClassLoader.findClass(FileClassLoader.java
:691)
at com.sap.engine.offline.FileClassLoader.loadClass(FileClassLoader.java
:600)
at com.sap.engine.offline.FileClassLoader.loadClass(FileClassLoader.java
:578)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:303)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at com.sap.sql.jdbc.NativeConnectionFactory.createNativeConnection(Nativ
eConnectionFactory.java:134)
... 17 more