I made a simple jspx page using jdeveloper11g and ADF
the page display the customer information
I connect to SQL server database
when testing the connection the test success but when running the application form JDEVELOPER I have this error

Dear Tarek

Check Your Entity Opject You have Primary Key attrbuite and ttis attrbuite not a Primary remove the Primary Key check box from this attrbuite

Thanks

Yasser