Hello SAP Gurus,
I request your help in correcting this error in Send Mail Step when it gets executed with Recipient type 'G' and in Expression I have assigned one multiline container element &Agents& .
Upon its execution, I get this step into error 'Work item 000000399243: Object 000000399243 method SENDTASKDESCRIPTION cannot be executed' .
I have checked the binding of standard task in control tab and seems to be fine :
After executing the workflow i have also checked the 'agents' in container and it gets populated with 3 users like USXXXXXXX however as per binding Address String does not get populated ... 
Please help me with your valuable inputs at your earliest convenience . Thanks !!