Solution : https://service.sap.com/sap/support/notes/1793690 (SAP Service marketplace login required)
Key words :
bex query designer process hangs, sap logon control dialog box, bex query designer reason, bex query designer, sap gui security, rfc error received, user-defined installations, user-defined case, rfc library librfc32, start 'sapgui' failed
Related Notes :
| 413708 | Current RFC library |