How to display a structure returned from bapi?

Hi,

I created a project that is accessing r/3.

On execution of my bapi its returning messages which is a structure.

I tried displaying it in my view using this code:

IWDMessageManager msgmgr = wdComponentAPI.getMessageManager();

msgmgr.reportSuccess(wdContext.currentReturnElement().getMessage());

but its throwing an exception

Can any one please suggest in this regard.

Regards,

Aparna.