Solution : https://service.sap.com/sap/support/notes/1264236 (SAP Service marketplace login required)
Key words : 
newly introduced starting method, runtime error bcd_baddata occurs, stateful server communication, trc file messages, sap gui attached, terms sap gui, sap gui locally, small data volumes, -scalar parameters occurred, cpic layer leads
Related Notes : 
       
| 1310832 | SAP Java Connector Release 3.0.2 | 
| 1258724 | Starting SAPGUI using external RFC libraries | 
| 1252962 | ArrayIndexOutOfBoundsException when opening a connection | 
| 1077727 | SAP JCo 3.0 release and support strategy |