oracle.apps.xdo.servlet.scheduler.ProcessingException: oracle.apps.xdo.XDOException error when tryin

I am trying to setup report scheduling on Siebel 8.0.0.12 with an IBM DB2 db using BI Publisher version 10.1.3.4.2 Build 132. When I schedule the report a screen pops up in Siebel saying the report was scheduled successfully. However, when you navigate to BI Publisher Reports >> Scheduled Reports >> History, it says the report failed with the following error:

oracle.apps.xdo.servlet.scheduler.ProcessingException: oracle.apps.xdo.XDOException
	at oracle.apps.xdo.servlet.scheduler.XDOJob.generateReport(XDOJob.java:983)
	at oracle.apps.xdo.servlet.scheduler.XDOJob.execute(XDOJob.java:418)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
Caused by: oracle.apps.xdo.XDOException
	at oracle.apps.xdo.servlet.ReportException.fillInStackTrace(ReportException.java:124)
	at oracle.apps.xdo.servlet.data.DataException.fillInStackTrace(DataException.java:127)
	at java.lang.Throwable.<init>(Throwable.java:181)
	at java.lang.Exception.<init>(Exception.java:29)
	at oracle.apps.xdo.servlet.ReportException.<init>(ReportException.java:40)
	at oracle.apps.xdo.servlet.data.DataException.<init>(DataException.java:44)
	at oracle.apps.xdo.servlet.RTFCoreProcessor.transform(RTFCoreProcessor.java:75)
	at oracle.apps.xdo.servlet.CoreProcessor.processScheduledRequest(CoreProcessor.java:517)
	at oracle.apps.xdo.servlet.CoreProcessor.processScheduledRequest(CoreProcessor.java:366)
	at oracle.apps.xdo.servlet.CoreProcessor.generateScheduledDocument(CoreProcessor.java:114)
	at oracle.apps.xdo.servlet.ReportImpl.renderScheduledJob(ReportImpl.java:357)
	at oracle.apps.xdo.servlet.scheduler.XDOJob.generateReport(XDOJob.java:977)
	... 3 more
Researching, I've noticed others have had similar error messages, but no one seems to have a solution to the problem. Any ideas on what's going on? Thanks!