problem creating OmeroMatlab session

[sophie]

Hi,
I'm also trying to connect Matlab with our server for omero. I installed the latest version of OmeroMatlab.
But I cannot create a session. In Matlab(R2010a) I got this:

>> loadOmero;
--------------------------
OmeroMatlab Toolbox
Beta-4.2.0-DEV-r6677-b3094
--------------------------
>> c=omero.client('141.52.175.99')

c =

omero.client@121671e

>> s=c.createSession('username','password')
28.04.10 16:11:56:903 warning: main: null - createSession retry: 1

28.04.10 16:12:01:112 warning: main: null - createSession retry: 2

??? Java exception occurred:
omero.ClientError: Obtained null object proxy

at omero.client.createSession(client.java:615)

Any idea what's going wrong?
Could it also be a problem with the versions? I got these:
java version "1.6.0_0"
OpenJDK Runtime Environment (IcedTea6 1.4.1) (6b14-1.4.1-0ubuntu13)
OpenJDK 64-Bit Server VM(build14.0-b08, mixed mode)
Python 2.6.2 (release26-maint, Apr 19 2009, 01:58:18)
Postgresql: 8.3.10
icegridnode --version 3.3.0
icegridadmin --version 3.3.0

Any help would be great!

[cxallan]

You cannot use OmeroMatlab from 4.2.0 (which is also not yet released) against a 4.1.x server.

Edit: The OpenJDK may also give you problems with Matlab so it may be good for you to switch to the Sun JDK.

[sophie]

Hi,
yes, that was definitely the problem. I downloaded Matlab-Beta-4.1.2 and now I can create a session.
Thanks for your help!