Solution : https://service.sap.com/sap/support/notes/667438 (SAP Service marketplace login required)
Key words : 
patch level 13 reason, latest sdm version, sdm patch level 13, patch level 13, sdm version                         1, notes relating, corrections contained, related notes, symptoms listed, date contained
Related Notes : 
       
| 667598 | Unexpected XML subelement: Additional references | 
| 667435 | SDM Remote GUI Server Side File does not recognize SCAs | 
| 532892 | Installing a new version of the Software Delivery Manager |