excepiiop tests failing with ExceptionThrower NullPointerException

All tests in the class org.jboss.test.excepiiop.text.ExceptionTimingStressTestCase fail, due to the call to home.create() in:
ExceptionThrowerHome home = (ExceptionThrowerHome)PortableRemoteObject.narrow(
getInitialContext().lookup(ExceptionThrowerHome.JNDI_NAME), ExceptionThrowerHome.class);
ExceptionThrower exceptionThrower = home.create();
throwing a null pointer exception. This error occurs in all test cases.

test execution
--------------------
C:\JBPAPP\JBPAPP-03-26-07-alpha4-BEA\src\testsuite>build.bat one-test -Dnode0=%M
YTESTIP_1% -Dnode1=%MYTESTIP_2% -DudpGroup=239.11.12.13 -Dtest=org.jboss.test.ex
cepiiop.test.ExceptionTimingStressTestCase
Calling ..\tools\bin\ant.bat one-test -Dnode0 10.16.32.161 -Dnode1 10.16.32.162
-DudpGroup 239.11.12.13 -Dtest org.jboss.test.excepiiop.test.ExceptionTimingStressTestCase
Buildfile: build.xml
one-test:
[delete] Deleting: C:\JBPAPP\JBPAPP-03-26-07-alpha4-BEA\src\testsuite\output\
log\test.log
[junit] Running org.jboss.test.excepiiop.test.ExceptionTimingStressTestCase
[junit] Tests run: 6, Failures: 0, Errors: 6, Time elapsed: 2.75 sec
[junit] Test org.jboss.test.excepiiop.test.ExceptionTimingStressTestCase FAILED

junit output
----------------
<testcase classname="org.jboss.test.excepiiop.test.ExceptionTimingStressTestCase"name="testNoException" time="2.688">
<error type="java.lang.NullPointerException">java.lang.NullPointerException:
at org.jboss.test.excepiiop.test.ExceptionTimingStressTestCase.testNoException(ExceptionTimingStressTestCase.java:85)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
</error>

server 'all' output during execution
-----------------------------------------------
17:36:41,546 INFO [EjbModule] Deploying ExceptionThrower
17:36:42,093 INFO [excepiiop/ExceptionThrower] EJBHome reference for excepiiop/
ExceptionThrower:
IOR:000000000000004E524D493A6F72672E6A626F73732E746573742E657863657069696F702E69
6E74657266616365732E457863657074696F6E5468726F776572486F6D653A303030303030303030
303030303030300000000000000200000000000000E4000102000000000D31302E31362E33322E31
363100000DC8000000304A426F73732F454A42486F6D652625657863657069696F70262545786365
7074696F6E5468726F7765722FACED000570000000050000000000000008000000004A4143000000
00010000001C00000000000100010000000105010001000101090000000105010001000000190000
003D0000000000000035687474703A2F2F64657631363A383038332F576562434C5B657863657069
696F702F457863657074696F6E5468726F7765725D2F000000000000002000000004000000000000
001F000000040000000300000001000000680000000000000003000000190000003D000000000000
0035687474703A2F2F64657631363A383038332F576562434C5B657863657069696F702F45786365
7074696F6E5468726F7765725D2F000000000000002000000004000000000000001F000000040000
0003
17:36:42,093 INFO [excepiiop/ExceptionThrower] Home IOR for ExceptionThrower bo
und to iiop/excepiiop/ExceptionThrower in JNP naming service
17:36:42,140 INFO [excepiiop/ExceptionThrower] Home IOR for ExceptionThrower bo
und to excepiiop/ExceptionThrower in CORBA naming service
17:36:42,156 INFO [EJBDeployer] Deployed: file:/C:/JBPAPP/JBPAPP-03-26-07-alpha
4-BEA/src/testsuite/output/lib/excepiiop.jar
17:36:42,999 INFO [EJBDeployer] Undeploying: file:/C:/JBPAPP/JBPAPP-03-26-07-al
pha4-BEA/src/testsuite/output/lib/excepiiop.jar
17:36:43,078 INFO [EjbModule] Undeployed ExceptionThrower