heck the SAP Note 1300651 - Workflow table is disabled - MDM Data Manager
https://websmp130.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=1300651
https://websmp130.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=1300651
In MDM Data Manager, make sure the Workflows table is the current table. In the Records pane, select any workflow record.
In the Record Detail tab, then double-click on the Workflow property to open Microsoft Visio. Choose Tools > Options from the Visio main menu.Choose File Paths to open the File Paths dialog. In the File Paths dialog, set both Add-Ons and Start-Up to the folder where the Worklfow.vsl file is installed (the Data Manager installation folder, by default). Click OK to close the File Paths dialog.
also go through the links below for similar issue
for MS visio version
http://forums.sdn.sap.com/thread.jspa?messageID=8213783#8213783
http://forums.sdn.sap.com/thread.jspa?messageID=6203237#6203237
http://forums.sdn.sap.com/thread.jspa?messageID=9608778#9608778
http://forums.sdn.sap.com/thread.jspa?messageID=2020392#2020392
In the Record Detail tab, then double-click on the Workflow property to open Microsoft Visio. Choose Tools > Options from the Visio main menu.Choose File Paths to open the File Paths dialog. In the File Paths dialog, set both Add-Ons and Start-Up to the folder where the Worklfow.vsl file is installed (the Data Manager installation folder, by default). Click OK to close the File Paths dialog.
also go through the links below for similar issue
for MS visio version
http://forums.sdn.sap.com/thread.jspa?messageID=8213783#8213783
http://forums.sdn.sap.com/thread.jspa?messageID=6203237#6203237
http://forums.sdn.sap.com/thread.jspa?messageID=9608778#9608778
http://forums.sdn.sap.com/thread.jspa?messageID=2020392#2020392
