Solution : https://service.sap.com/sap/support/notes/394993 (SAP Service marketplace login required)
Key words : 
sap reference img -> general settings -> units, additional key words flexible analysis, flexible analysis, expected number, decimal places, report writer, mch1decimal places, ----- supportguide 20010627070826 -----reportwriter, report layout, system issues
Related Notes : 
       
| 174132 | Flexible analysis: Composite note |