Runtime Builder and Solution Model

Is ti possible that the Solution model doesn’t work with the Runtime Builder?
I have used the solution Model in my application and it works without any problems. When I export the application to Runtime it doesn’t do a thing.

this is what the console says:

11-03-09 14:44:13 [0x0-0x58058].com.apple.JarLauncher[566] Exception Object: java.lang.ClassCastException: com.servoy.j2db.persistence.Solution
11-03-09 14:44:13 [0x0-0x58058].com.apple.JarLauncher[566] MSG: com.servoy.j2db.persistence.Solution

We found a bug in the runtime client related to solution model. This is fixed now and will be included in 4.1.1 i1.