Solution : https://service.sap.com/sap/support/notes/1115253 (SAP Service marketplace login required)
Key words : 
hr personnel number/ bp number/ applicant numberavailable, safetysnronumber range objectnumber rangeehsambtaetehsbc02ehsvu11ehsquestohehsva02 reason, prerequisites reasonnumber range objects, terms occupational healthindustrial hygiene, number range objects required, ehs_srv_nuthis number range object, relevant number range object, number range objects, number range object, ' ' number range object
Related Notes : 
       
| 1042993 | Settings in Customizing for EH&S Indus. Hygiene and Safety | 
| 995953 | Number range interval 'EHS_RECN' | 
| 993703 | Number range interval for examinations 'EHS_EXA_CO' | 
| 895828 | Service provider in examination | 
| 362196 | Setting up number ranges in Industrial Hygiene and Safety |