Until yet i was not able to solve the problem. The problem as described is probably the result of the use of a specialization/generalization.construction (therefore not firebug/clearing cache,etc)
If someone has a glue to solve the problem with the use of a specialization/generalization construction, it would help me a lot!
Ben
Hi Ben,
For specific errors such as this, I suggest filing a bug report with a small test project at support.mendix.com.