for instance, the link:

http://mmdb-dev.ncsa.uiuc.edu:8080/mmdb/pyramid/uri/tag:medici@uiuc.edu,2009:data_M_K636VJeBzKD8HNL1LOMg

returns this:

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.IllegalArgumentException: Error: the subject is null
org.tupeloproject.kernel.beans.BeanSessionImpl.fetchBean(BeanSessionImpl.java:610)
edu.illinois.ncsa.mmdb.web.server.TupeloStore.fetchBean(TupeloStore.java:188)
edu.illinois.ncsa.mmdb.web.rest.ImagePyramidServlet.doGet(ImagePyramidServlet.java:127)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.
Apache Tomcat/6.0.20