Coexistence of WebSphere Business Monitor and Process Server 6.2

UPDATE 11/12: The fix for the issue described below is included in WBM 6.2 Fixpack 2, now publicly available.

ORIGINAL POST:
If you installed WebSphere Business Monitor (aka BAM) version 6.2 into the same directory as Process Server or WESB 6.2, you may run into problems with overlapping OSGI plugins.
Your WPS/WESB modules and mediations could fail with JXPath error like this:

[5/18/09 19:25:21:744 EDT] 0000005f ExceptionUtil E CNTR0020E: EJB threw an unexpected (non-declared) exception during invocation of method "transactionRequiredActivitySessionNotSupported" on bean "BeanId(TestFanoutApp#TestFanoutEJB.jar#Module, null)". Exception data:
Mediation primitive failure:
Mediation primitive: FanOut1
Component: TestFanout
Module: TestFanout
com.ibm.wsspi.sibx.mediation.MediationBusinessException: CWSXM3752E: Error using XPath expression [Ljava.lang.Object;@7d6e7d6e to locate repeating element: org.apache.commons.jxpath.JXPathException: No value for xpath: /body/print/input/orders. This has been reported by the following entity: ID=FanOut1,Request,print,PrintOrder,http://TestFanout/PrintOrder,TestFanout,TestFanout
at com.ibm.ws.sibx.mediation.primitives.util.ExceptionHelper.newMediationBusinessException(ExceptionHelper.java:128)
at com.ibm.ws.sibx.mediation.primitives.fan.FanOutMediation.locateRepeatingElement(FanOutMediation.java:726)
at com.ibm.ws.sibx.mediation.primitives.fan.FanOutMediation.performNonAggregationMediate(FanOutMediation.java:593)
at com.ibm.ws.sibx.mediation.primitives.fan.FanOutMediation.mediate(FanOutMediation.java:265)
at com.ibm.ws.sibx.scax.mediation.engine.JavaMediationPrimitive.performInvocation(JavaMediationPrimitive.java:630)
at com.ibm.ws.sibx.scax.mediation.engine.JavaMediationPrimitive.invoke(JavaMediationPrimitive.java:352)
at com.ibm.ws.sibx.scax.mediation.engine.MediationPrimitive.invokeConnections(MediationPrimitive.java:318)
at com.ibm.ws.sibx.scax.mediation.engine.JavaMediationPrimitive.fireOutputTerminals(JavaMediationPrimitive.java:728)
at com.ibm.ws.sibx.scax.mediation.engine.JavaMediationPrimitive.performInvocation(JavaMediationPrimitive.java:650)
at com.ibm.ws.sibx.scax.mediation.engine.JavaMediationPrimitive.invoke(JavaMediationPrimitive.java:352)
at com.ibm.ws.sibx.scax.mediation.engine.MediationPrimitive.invokeConnections(MediationPrimitive.java:318)
at com.ibm.ws.sibx.scax.mediation.engine.Input.invoke(Input.java:138)
at com.ibm.ws.sibx.scax.mediation.engine.RequestFlow.invokeFlow(RequestFlow.java:132)
at com.ibm.ws.sibx.scax.mediation.engine.MediationFlow.invokeRequestFlow(MediationFlow.java:145)
at com.ibm.wsspi.sibx.mediation.flow.ejb.MediationFlowBean.invokeRequestFlow(MediationFlowBean.java:231)
at com.ibm.wsspi.sibx.mediation.flow.ejb.EJSLocalStatelessTestFanout_c53bef64.invokeRequestFlow(EJSLocalStatelessTestFanout_c53bef64.java:127)
at com.ibm.ws.sibx.scax.mediation.component.ejb.EJBMediationFlowComponentImpl.invokeRequestFlow(EJBMediationFlowComponentImpl.java:223)
at com.ibm.ws.sibx.scax.runtime.handler.MFCImplementationHandler.processMessage(MFCImplementationHandler.java:199)
at com.ibm.ws.sca.internal.message.impl.MessageDispatcherImpl.processMessageWithPCI(MessageDispatcherImpl.java:715)
at com.ibm.ws.sca.internal.message.impl.MessageDispatcherImpl.processMessage(MessageDispatcherImpl.java:1167)
at com.ibm.ws.sca.internal.message.impl.ManagedMessageImpl.process(ManagedMessageImpl.java:843)
at com.ibm.wsspi.sca.ejb.module.impl.ModuleSessionBean.processUOWMessage(ModuleSessionBean.java:336)
at com.ibm.wsspi.sca.ejb.module.impl.ModuleSessionBean.transactionRequiredActivitySessionNotSupported(ModuleSessionBean.java:315)
at com.ibm.wsspi.sca.ejb.module.EJSLocalStatelessModule_43132892.transactionRequiredActivitySessionNotSupported(EJSLocalStatelessModule_43132892.java:233)
at com.ibm.ws.sca.internal.uow.handler.UOWStrategyImpl.transactionGlobalActivitySessionFalse(UOWStrategyImpl.java:311)
at com.ibm.ws.sca.internal.uow.handler.JoinUOWHandler.processMessage(JoinUOWHandler.java:165)
[snip]

Or you may have classloading problems when trying to work with monitor models.

Same issues may occur with fixpack 1 of both products (WPS/WESB 6.2.0.1 and WBMonitor 6.2.0.1)
This is happening because WPS/WESB and WBM/BAM each comes with its own version of JXPath libraries. A fix for this issue will soon be publicaly available from the monitor team. It would restrict visibility of JXPath library packaged with WBM to monitor code.
If your symptoms match, please ask IBM support about JR33245.