Solution : https://service.sap.com/sap/support/notes/620723 (SAP Service marketplace login required)
Key words : 
solution start transaction abap dictionary, import support package sapke46c70, planned working time, social insurance nl, external agencies nl, fiscal data nl, support package, pensions nl, personal data, structure p05_sim_par
Related Notes : 
       
| 782140 | OCS: Known problems with Support Packages in Basis Rel. 6.20 | 
| 447925 | OCS: Known problems with Supp. Packages in Basis Rel.6.20 | 
| 173814 | OCS: Known problems with Support Packages for Release 4.6 |