Solution : https://service.sap.com/sap/support/notes/850989 (SAP Service marketplace login required)
Key words : 
transaction tax engine reason, prerequisites program error solution, xmltotteinputdocument [main] error, mobile client show, mobile sales, currconversions node, longer occurs, support package, ttexmlexception, note 486061
Related Notes : 
       
| 486061 | How to get patches for CRM Internet Pricing Configurator |