I more bit of information, I changed the password in app.config to be an incorrect password to see if the error message would change. It still failed with the same error message. So, nothing different.

Rick


>Rick,
>
>>When I go to test the business rules by invoking a method, I receive the Invoke Method window. I enter a string "G123", this error:
>>
>>An unhandled exception of type 'System.InvalidOperationException' occurred in Microsoft.VisualBasic.dll
>>
>>Additional information: The ConnectionString property has not been initialized.
>
>Did you remember to instantiate an instance of AAppTest first?
>
>Best Regards,