null pointer on priv operation with no results

I cannot get GrouperClient getGrouperPrivilegesLiteWs to list a subject's privileges by stem in 1.4.1. It works when I give it a group name, but with a stem name, I get this error in the log:
Mar 20, 2009 9:29:59 AM edu.internet2.middleware.grouperClient.GrouperClient main
SEVERE: null
java.lang.NullPointerException
at edu.internet2.middleware.grouperClient.GrouperClient.getGrouperPrivilegesLite(GrouperClie
nt.java:781)
at edu.internet2.middleware.grouperClient.GrouperClient.main(GrouperClient.java:301)

I can successfully find the groups in the stem using this:
java -jar grouperClient.jar --operation=findGroupsWs --queryFilterType=FIND_BY_STEM_NAME --stemName=XYZ

I can successfully get privileges for a group within the stem using this:
java -jar grouperClient.jar --operation=getGrouperPrivilegesLiteWs --subjectId=123xxxxxxxxxx --groupName= XYZ:testgroup4

But this fails:
java -jar grouperClient.jar --operation=getGrouperPrivilegesLiteWs --subjectId=123xxxxxxxxxx --stemName= XYZ

Paul Gazda