Solution : https://service.sap.com/sap/support/notes/434899 (SAP Service marketplace login required)
Key words : 
symptom error message, transaction id 3a6, 'regenerate middleware services, terms generation, smogpp reason, incorrect objects, generating queue, solution carry, upgrade guide, enterprise buyer
Related Notes : 
       
| 523152 | Additional information on upgrading to SAP CRM 3.1 |