TN61 error

Hi,
I am getting the following error whhen I start TN console. I read the threads related to this error and implemented but no success. I am using oracle 8i with IS 6.1.

Title:

Error filling BizDocTypeStore cache

Class:

java.lang.NullPointerException

Stack Trace:

java.lang.NullPointerException

at com.wm.data.ValuesEmulator.get(ValuesEmulator.java(Compiled Code))
at com.wm.app.tn.db.BDTypeOperations.bytesToType(BDTypeOperations.java:285)
at com.wm.app.tn.db.BDTypeOperations.getAllTypes(BDTypeOperations.java:62)
at com.wm.app.tn.db.BDTypeOperations.getAll(BDTypeOperations.java:30)
at com.wm.app.tn.db.BizDocTypeStore.fillCache(BizDocTypeStore.java:50)
at wm.tn.doctype.init(doctype.java:54)
at wm.tn.admin.startup(admin.java:730)
at java.lang.reflect.Method.invoke(Native Method)
at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java:287)
at com.wm.app.b2b.server.invoke.InvokeManager.processnvokeManager.java:554)
at com.wm.app.b2b.server.invoke.StatisticsProcessor.process(StatisticsProcessor.java:44)
at com.wm.app.b2b.server.invoke.ServiceCompletionImpl.process(ServiceCompletionImpl.java:221)
at com.wm.app.b2b.server.invoke.ValidateProcessor.process(ValidateProcessor.java:49)
at com.wm.app.b2b.server.ACLManager.process(ACLManager.java:194)
at com.wm.app.b2b.server.invoke.DispatchProcessor.process(DispatchProcessor.java:39)
at com.wm.app.b2b.server.AuditLogManager.process(AuditLogManager.java:384)
at com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:486)
at com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:359)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:246)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:128)
at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:100)
at com.wm.app.b2b.server.SessionInvoke.run(Session.java:705)
at com.wm.util.pool.PooledThread.run(PooledThread.java:105)
at java.lang.Thread.run(Thread.java:512)