What does an ESFRuntimeException mean?

Hello All,

could anyone please tell me what does an ESFRuntimeException mean? I'm using the standard WebDynPro APIs, however when I try to get the ID of a record from the backend, I get this.

Here is the line of Code that's causing it:

 nodeElement = nodeElement.getAssociatedBONodeElement(idNodePath<i>); 

The scenario is:

I save and activate a record in a cell and there the Description comes up fine, but when I refresh the screen, the description is lost due to this Exception.

Could anyone please advise ?

Thanks a lot,

Shakul