Entity Bean - Exception: MissingSubstitutionException ?

Hello,

i created an entity bean and i configured the persisten.xml.

If if create a data-source-aliases.xml in my ear project the deployment fails with the mentioned exception which is not documented anywhere.

Otherwise if i delete the data-source-aliases.xml i can deploy the application but i can not start it in the browser.

Does someone knows something about the problem?

André