Error List does not exist
                            
                         
                        
                     
                 
                
                    Hi all, I am working on sharepoint 2010. I have created a list work flow in Share Point Designer 2010.
in the first step I put an 'If any value' condition and put email, and to-do in it, deploy and run the work flow it works fine.
later I change the work flow and put email, and to-do to run in parallel activity, deploy and now when I tried to upload a file in the document library its giving me following error.
List does not exist.
The page you selected contains a list that does not exist.  It may have been deleted by another user.
can some body tell me why I am getting this error...