Error when determining attribute 'OBJECTTOAPPROVE' of object instance
I'm using Item-based level approval shopping cart. I've written code in BADI for approval level as per our requirement. When I create shopping cart, it is triggering workflow and going to particular user, but when I saw the step history for the approval activity it shows, Error when determining attribute 'OBJECTTOAPPROVE' of object instance BO.BUS30003.
And when I execute the workitem, the status changes to error state and it has one more message in step history which is Work item 000000006030: Object FORM method HTMLPROCESS cannot be executed.
Any one knows about this errors ?