Solution : https://service.sap.com/sap/support/notes/891009 (SAP Service marketplace login required)
Key words : 
component ca-cad-lib-pro, relevant sap system folders ', licence mechanism fully activated, valid license files 'relicence, required sap transport files, remove files ' relicence, symptom licence check, e-mail address, sap plm integration, sap contract number
Related Notes : 
       
| 1491669 | HRE: SAP PLM Integration Unicode character sets | 
| 768550 | HRE: Prerequisites for SAP PLM integration for Pro/E | 
| 700586 | HRE: FAQs about SAP PLM Integration for Pro/ENGINEER |