Solution : https://service.sap.com/sap/support/notes/724257 (SAP Service marketplace login required)
Key words : 
limitation inmax number, upalthough iacor service, iacor service - service, iacor service, terms iacor, message'failed, connection reason, solution install, support package, download procedure
Related Notes : 
       
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace | 
| 335521 | ITS patch installation of kernel files | 
| 330793 | Downloading patches |