Solution : https://service.sap.com/sap/support/notes/1106555 (SAP Service marketplace login required)
Key words :
RFCGUI_UNEXPECTED_DATA
Related Notes :
| 1036194 | OS timers are not synchronized |
| 827671 | RFCGUI_UNEXPECTED_DATA |
SAP Note 1106555 - RFCGUI_UNEXPECTED_DATA on AMD64 platforms
Component : Client/Server Technology - RFC