Problem in switching JCOs

Question

Hi,
I have a very peculiar situation out here :(. I have a single webndynpro application and need it to connect to multiple backends.
The DC structure is as follows:
1) DC_UTILS - this DC contains components that actually execute the model objects. It has its own SINGLE model that consists of proxy classes for many RFCs. At the time of creation, these model classes were created with JCOs, "WD_MODELDATA_ABC" and "WD_RFC_METADATA_ABC".
2) DC_FAP - This DC uses DC_UTILS. It contains the entire business logic and screen flow and calls methods exposed by DC_UTILS.
3) DC_RUN - This DC uses DC_FAP. It has an application called 'RunApp' that calls the "Window Interface View Controller" of a component within DC_FAP.
I have tried to add the "sap-wd-arfc-useSys" parameters in the URL and fire the application, 'RunApp'. I am doing this by adding the above parameters to the URL dynamically in the "onPlugDefault" event handler of RunApp's Window interface View Controller. But somehow, the classes within DC_UTILS seem to get executed BEFORE the "onPlugDefault" method of the Window Interface View Controller (and hence the model proxies are generated with the JCO that I had used at design time)... and hence JCO switching doesn't take place.
I tried the above method in a single DC that contains the model classes, business logic and execute methods and it worked absolutely fine. The problem arises when I start using one DC in another. Somehow, the used DC's model classes get initialized with the JCO names set at design time , EVEN BEFORE THE onPlugDefault of the Window Interface View Controller of the USING DC is called. Is there any method / event in the USING DC that is called BEFORE the classes in the USED DC are initialized ?
regards,
Navneet.

Answer 1

Hi,
I tried using caps for the password......it didnt work.
The parameters given are the same as in dev but i get this error when I ping the JCO created : "com.sap.mw.jco.JCO$Exception: (103) RFC_ERROR_LOGON_FAILURE: Name or password is incorrect."
Are there any priveleges which are needed for JCO creation to use the same userid/pwd in staging?
What could be the other possibility?
Please suggest.
Regards,
Rajani