Solution : https://service.sap.com/sap/support/notes/438720 (SAP Service marketplace login required)
Key words : 
additional key words ehs27bproduct safetyreport generationlogo, x_rcglsyval-filep    = x_rcglsyval-val_string            x_rcglsyval-val_type = '3', x_rcglsyval-filep    = x_rcglsyval-val_string             x_rcglsyval-val_type = '3', system copies blank field val_string, newly created final reports, ehs standard system ensures, default parameter determination returned, returns field val_string, system correctly returns, prerequisites causein eh&
Related Notes : 
       
| 423411 | Corrections EH&S 2.7B: Support Package 02 | 
| 391318 | EH&S 2.7B corrections: Support Package 01 |