VariablePropertyDataNonBiDi not supported in automation ?

[golive]

Hi

I've created an InstallAnywhere project. As other users should be able to use my project (change some version variable), I want to use automation to hide all IA complex screens.

But in my test exemple, I got :
Exception in thread "AWT-EventQueue-0" com.zerog.ia.auto.project.ProjectAutomationException: The class 'com.zerog.ia.installer.util.VariablePropertyDataNonBiDi' is not supported by the project automation API.

my exemple is very basic:
ProjectAutomation.setIALocation(jIA.getText());
pProject = ProjectAutomation.loadProject(jProject.getText());

any hint ?

regards