Error in worksheet after running simulation

Hi,

After running simulation, getting the following issues in the worksheet.

After running simulation ,getting the following issues. Data was available in the worksheet before running simulation. After running simulation, the first message we get is ‘Worksheet has no data’, the message

"com.demantra.tunnel.ProtocolLevelException:ODPM-10332:Failed to resolve class in task result object graph" 

and then work sheet reruns and gives a message ‘Worksheet has not data’. If we move to the next item, we get a message ‘page loading cancelled’.

Any pointers will be helpful.

Thanks!