Adaptive RFC2 Model Error

Hi Experts,

In my project we have used Adaptive RFC2 model to call ABAP functions. All the JCo destinations are working fine and tested successfully.

But an error is coming while executing one of the custom application.

I have attached an error along with this.

Error :

java.lang.illegalArgumentexception: must not add role listener with role null

May I know what could be the cause?

Thanks in advance.

Regards,

Sheetal