Strange error message

Hello,

I used to have unique primary keys, generated at the adaptor level.
The problem is that, when stored in a string PKs are very large, that's  
why I decided to use Integer primary keys.

Since I have made the corresponding modification I keep having strange  
error messages or behaviors.
For example, when I ask to fetch an object of entity "A" I have a  
ClassCastException telling me that the object of class "B" has been  
casted to object of class "A".
Note that in my model, those classes are not related with inheritance.

I also get a NPE somewhere in a private API of EOF (see provided  
stack-trace at the end of the mail).
I cannot tell what's going on, so please EOF gurus help me find the key  
to this problem ...


Camille



---------------------------------------------------
A stack-trace of an unknown exception.



[2002-10-08 17:24:23 CEST] <WorkerThread13>  
java.lang.NullPointerException
	at  
com.webobjects.eoaccess.EODatabaseContext._objectFaultWithSnapshotRelati 
onshipEditingContext(EODatabaseContext.java:2373)
	at  
com.webobjects.eoaccess.EODatabaseContext._fireDeferredFaultWithSourceOb 
ject(EODatabaseContext.java:2421)
	at  
com.webobjects.eoaccess.EOAccessDeferredFaultHandler.createFaultForDefer 
redFault(EOAccessDeferredFaultHandler.java:38)
	at  
com.webobjects.eocontrol.EOCustomObject.willReadRelationship(EOCustomObj 
ect.java:892)
	at  
com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer$_LazyG 
enericRecordBinding.valueInObject(_EOMutableKnownKeyDictionary.java:533)
	at  
com.webobjects.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject 
.java:1174)
	at odaiko.db._ODCooptation.coopted(_ODCooptation.java:84)
	at odaiko.app.OTSession.participant(OTSession.java:40)
	at odaiko.app.OTSession.setUser(OTSession.java:75)
	at  
odaiko.interactive.OXIdentificator.prepareSessionWithRequest(OXIdentific 
ator.java:23)
	at  
odaiko.app.SLDAIdentificator.prepareSessionWithRequest(SLDA.java:128)
	at odaiko.app.SLDA.prepareWithRequest(SLDA.java:44)
	at  
odaiko.interactive.OXStaticAction.triggerAction(OXStaticAction.java:73)
	at java.lang.reflect.Method.invoke(Native Method)
	at  
com.webobjects.appserver.WODirectAction.performActionNamed(WODirectActio 
n.java:151)
	at  
com.webobjects.appserver._private.WODirectActionRequestHandler._handleRe 
quest(WODirectActionRequestHandler.java:174)
	at  
com.webobjects.appserver._private.WODirectActionRequestHandler.handleReq 
uest(WODirectActionRequestHandler.java:307)
	at  
er.extensions.ERXDirectActionRequestHandler.handleRequest(ERXDirectActio 
nRequestHandler.java:29)
	at  
com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.jav 
a:1133)
	at  
com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread. 
java:158)
	at  
com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java 
:231)
	at java.lang.Thread.run(Thread.java:491)