Solution : https://service.sap.com/sap/support/notes/1139506 (SAP Service marketplace login required)
Key words :
'proxy method invocation error, sap basis release nw 7, iw workflow report s_osp_wf_item_selection, workflow pattern report reason, sap basis nw 7, item selection report, standard sp16 release, workflow templates results, rfc s_osp_wf_bkt_perfm_crud results, workflow submit date
Related Notes :
1149693 | Duet 1.5 SP01: Release Information Note |
1028938 | Workflow: Composite note |