I have created BPMN 2.0 flow Using BPMN diagram template in Microsoft Visio Professional Preview 2013.The symbols and connectors are present when I saved the file. After few days I wanted to rework on that file so I opened the Visio File, Some of the shapes and connectors were disappeared. I am facing this problem very frequently. Is there any issue with Microsoft Visio Professional Preview 2013 is there any updates available for Visio 2013.Suggest any solution so that I can recover the file.