Solution : https://service.sap.com/sap/support/notes/381834 (SAP Service marketplace login required)
Key words : 
terms product safetyspecification managementspecification information systemhit list reason, wvate values back    update estva, write values back    update estri, call function 'db_commit'           exceptions, ri_tab       type standard table, va_tab       type standard table, search functions require, / ri_cnt left-justified, / va_cnt left-justified, correct initial values
Related Notes : 
       
| 1114535 | FAQ: Searching in the specification workbench | 
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| 394519 | Installation of SAP EH&S 2.7B/4.5B | 
| 393855 | Installing SAP EH&S 2.7B/4.6C | 
| 392841 | Installation of SAP EH&S 2.7B/4.6B | 
| 357465 | Corrections EH&S 2.7B |