Solution : https://service.sap.com/sap/support/notes/654355 (SAP Service marketplace login required)
Key words : 
detail' -> 'application platform' -> 'connectivity' -> 'connectors' -> 'sap java connector' -> 'tools & services', initialize dynamic link library sapjcorfc, command=java -xms64m -xmx512m -xrs 5, sap jco version integrated, existing files differ slightly, download sap jco release 2, server-specific start settings, 'echo %java_home%' command line, latest sap jco, java virtual machine
Related Notes : 
       
| 710725 | IPC 4.0, conflicting RFC and/or JCO DLLs | 
| 682707 | NullPointer TTEKernel or JavaOutOfMemory if TTE is inactive | 
| 677063 | IPC server crashes and is restarted | 
| 522156 | IPC 3.0, conflicting RFC and/or JCO DLLs |