Solution : https://service.sap.com/sap/support/notes/720539 (SAP Service marketplace login required)
Key words : 
symptom previously, terms iacor, 20 patch level 10, download procedure, display information, existing connections, 'iacorcmd -i', information, connections, iacorcmd -
Related Notes : 
       
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace | 
| 335521 | ITS patch installation of kernel files | 
| 330793 | Downloading patches |