Solution : https://service.sap.com/sap/support/notes/82644 (SAP Service marketplace login required)
Key words : 
i_stlty_w          stpf-stlty_w                                xi_stlnr_w          stpf-stlnr_w                                xi_stlal_w          stpf-stlal_w                                xi_stlty            stpf-stlty                                  xi_stlnr            stpf-stlnr                                  xi_stlal            stpf-stlal                                  xi_stvkn            stpf-stvkn                                  xi_stlst                          csex_node_link_type-stlst     xi_stlwg                          csex_node_link_type-stlwg     xi_stlwg_v                        csex_node_link_type-stlwg_v   xexport parameter reference type                reference e_kante_k        csex_node_link_type-kante_k   xexceptions key_incompleteno_path_tabno_path_availablethe source code, field     reference i_stlty_w          stpf-stlty_w   xi_stlnr_w          stpf-stlnr_w   xi_stlal_w          stpf-stlal_w  xchanging parameter reference type       reference c_node_link        csex_node_link_type  xexceptions key_incompletethe source code, field     proposal      optionalkante            plmz-kante     space           xstlty_w          plmz-stlty_w   space           xstlnr_w          plmz-stlnr_w   space           xstlal_w          plmz-stlal_w   space, field      reference i_stlty_w          stpf-stlty_w    xi_stlnr_w          stpf-stlnr_w    xi_stlal_w          stpf-stlal_w    xexport parameter   ref, field     reference i_stlty_w        stpf-stlty_w   xi_stlnr_w        stpf-stlnr_w   xi_stlal_w        stpf-stlal_w  xthe source code, type proposal   reference i_stlty_w        stpf-stlty_w                       xi_stlnr_w        stpf-stlnr_w                       xi_stlal_w        stpf-stlal_w                       xi_flg_set_lock, field      reference e_path_max        stzu-maxkan     xtable parameter    reference type i_itm_trans        csex_itm_trans_tab_typeexceptions wrong_key_in_itm_transforeign_locksystem_failurethe source code, structureimport parameter   reference structure i_stlty            plmz-stltyi_stlnr            plmz-stlnri_stvkn            plmz-stlkni_kante            plmz-kanteexceptions, field e_stlty_w        stpf-stlty_we_stlnr_w        stpf-stlnr_we_stlal_w        stpf-stlal_wthe source code, stpf        mandtstpf        stlty_wstpf        stlnr_wstpf        stlal_wstpf        kante_k 32
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| 216261 | Incorrect / double material component assignments in recipe | 
| 125637 | Termin.comp.allo.routing, corrctng data incnsistncy | 
| 124105 | Component allocation lost for variant BOM | 
| 121212 | Component assignment of direct production assmblies | 
| 109650 | C251: Output of too many/too few materials | 
| 101281 | CA01: Upgrade problem for component allocation | 
| 96485 | Copying a sales order routing | 
| 91805 | Phantom assemblies in recipe | 
| 91179 | Validity of component allocation in prodn. order | 
| 89521 | Batch: Component allocation of phantom assemblies | 
| 86114 | Modification: branches are lost for paths > 99 | 
| 83289 | Printing component allocatn of phantom assemblies | 
| 82920 | Component allocation of phantom assemblies (BOM) | 
| 82838 | Component allocation of assemblies (prodctn order) | 
| 81656 | CO01: Component allocation in the collective order | 
| 75943 | Incorrect component allocatn for phantom assemblies | 
| 73259 | CO01: Allocating components to an operation | 
| 71475 | Incorrect component allocation for operation | 
| 70815 | Allocation of phantom assemblies |