[omniORB] Marshal exception

[vaibhav jha]

I am using omniorbpy,activestate python 2.1.1 on windows nt 4.0 
workstation.I am trying to pass a dictionary as a parameter of hte 
function called by client through the corba server.

my idl definitions are:

module messenger
{
   typedef sequence<long> Seq;
   interface Echo {
     echoString(in Seq mesg);
   };
};

My server program is :

import sys
 from omniORB import CORBA, PortableServer
import messenger,messenger__POA
class Echo_i (messenger__POA.Echo):
 	def echoString(self, mesg):
 		print "echoString() called with message:", mesg
 		#return mesg


orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)
poa = orb.resolve_initial_references("RootPOA")
ei = Echo_i()
eo = ei._this()

print orb.object_to_string(eo)

poaManager = poa._get_the_POAManager()
poaManager.activate()

orb.run()


My client program is :

import sys
 from omniORB import CORBA, PortableServer
import messenger,messenger__POA
class Echo_i (messenger__POA.Echo):
 	def echoString(self, mesg):
 		print "echoString() called with message:", mesg
 		#return mesg


orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)
poa = orb.resolve_initial_references("RootPOA")
ei = Echo_i()
eo = ei._this()

print orb.object_to_string(eo)

poaManager = poa._get_the_POAManager()
poaManager.activate()

orb.run()

import sys
 from omniORB import CORBA
import Example
orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)

ior = sys.argv[1]
#print "ior is ::",type(ior)
obj = orb.string_to_object(ior)
eo = obj._narrow(Example.Echo)

if eo is None:
 	print "Object reference is not an Example::Echo"
 	sys.exit(1)

message = {"message":"Hello from Python"}
eo.echoString(message)

but when i run the client program it gives the following error:

D:\CORBA>python.exe client.py 
IOR:010000001500000049444c3a4578616d706c652f456368
00002a000000010100000d0000003137322e32302e352e31363500006d040e000000fe3c880d3d00
0000f50000000000
Traceback (most recent call last):
   File "client.py", line 8, in ?
     obj = orb.string_to_object(ior)
   File "d:\omni\lib\python\CORBA.py", line 477, in 
string_to_object
     sys.modules["CORBA"] = omniORB.CORBA
omniORB.CORBA.MARSHAL: Minor: 0, Completed: COMPLETED_NO.

What are the possible reasons for the Marshal exception?
How do i solve the problem?

Thanking you in advance.
Yours truly
Vaibhav.

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