Blackboard: Linking from within a course

Greetings!
A couple of days ago I posted an announcement to the BLKBRD-L listserv about a Blackboard Building Block Vanderbilt is making publically available. (Just posting here to make sure everyone who might be interested is aware of the tool.)
The Building Block is different from the one created by Baker College in that we link to iTunesU directly within a course. The information we pass is minimal; we go to extreme lengths in preserving student privacy, so we pass very little information about the user. The process itself is not too time consuming and I'm welcoming feedback from schools who are implementing our 'Block.
At this point, we are making it available to other institutions via direct email requests. If you would like a copy, please email me cindy dot franco at vanderbilt dot edu.
Cindy
Tablet PC Windows XP Pro

Greetings,
We have been using Vanderbilt iTunes U Building Block for about 9 months. The authentication process from Bb to iTunes U works Ok. However, certain users are getting the following Java error (sometimes students, or instructors) in Bb when they click on the iTunes U link to be redirected to iTunes. The course is setup fine because I'm able to use the same link without a problem. Below is the error:
The specified object was not found.
Hide details
blackboard.persist.KeyNotFoundException: The specified object was not found.
at blackboard.persist.impl.NewBaseDbLoader.loadObject(NewBaseDbLoader.java:140)
at blackboard.persist.course.impl.CourseDbLoaderImpl.loadById(CourseDbLoaderImpl.j ava:106)
at blackboard.persist.course.impl.CourseDbLoaderImpl.loadById(CourseDbLoaderImpl.j ava:78)
at blackboard.persist.course.impl.CourseDbLoaderImpl.loadById(CourseDbLoaderImpl.j ava:70)
at org.apache.jsp.proxy.redirectorjsp._jspService(redirectorjsp.java:185)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at sun.reflect.GeneratedMethodAccessor43.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:245)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterCha in.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.ja va:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:152)
at blackboard.platform.servlet.ContentTypeFilter.doFilter(ContentTypeFilter.java:5 6)
at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterCha in.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.ja va:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:152)
at blackboard.platform.servlet.RequestSessionFilter.handleRequest(RequestSessionFi lter.java:314)
at blackboard.platform.servlet.RequestSessionFilter.doFilter(RequestSessionFilter. java:152)
at sun.reflect.GeneratedMethodAccessor203.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterCha in.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.ja va:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:152)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:10 7)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684)
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:87 6)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:6 84)
at java.lang.Thread.run(Thread.java:595)

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