Problem adding external jars when using RMI plug-in

[andr33a]

Hello!

I'm new to using the RMI plug-in. I have tried the plug-in demo on the site and it worked ok.
Now, I'm trying to develop my own RMI project and I want to log any caught exception in a log file using the log4j jar. The problem is that when I run my RMI client and server I get the following error message:
"Variable references non-existing resource: ${workspace_loc:/path_to_log4j.jar}"
though I have included the log4j jar as an External Jar and it can be found at the specific location on my computer.
I have noticed that this error doesn't occur when I run a non RMI project.

Any suggestion is wellcome!