SAP ABAP Message Class WL (Workflow: run-time messages) is used by

• Class (16)
• Function Module (95)
• PINF (3)
• Program (90)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	/IWWRK/CL_WF_UPDATE_WORKITEM Method: OPERATION_RESERVE_VAL	Update workitem handler class	/IWWRK/WF_RT_IB	/IWWRK/CORE	SAP_GWFND
2	Class	CL_FOPCW_WF Method: IF_FOPCW_WORKFLOW~GET_STATUS_INFO	SAP Webflow	FOPC_WORKFLOW	FIN_INTERNAL_PROCESS_CONTROL	FINBASIS
3	Class	CL_SWF_GP_AUNIT_RUN Method: GET_FIRST_ACTION	Unit Test GP Runtime	SWF_GP_RUN	BASIS	SAP_BASIS
4	Class	CL_SWF_RDG_DISPATCHER Method: EXECUTE_DIALOG_REQUEST_MULTI	Workflow: Interaction Dispatcher	SWF_RDG	BASIS	SAP_BASIS
5	Class	CL_SWF_UTL_GET_DEPENDANT_WIS Method: GET_WORKITEMS	Workflow: Determining Dependent Work Items	SWF_UTL	BASIS	SAP_BASIS
6	Class	CL_SWL_ADM_COMMAND Method: CONTAINER_CHANGE	Workflow: Command for Administrations	SWL	BASIS	SAP_BASIS
7	Class	CL_SWL_ADM_SCREEN_HANDLER Method: ADMIN_ON	Workflow: Docking Container for Administration Functions	SWL	BASIS	SAP_BASIS
8	Class	CL_SWL_ADM_SCREEN_HANDLER Method: ADMIN_OFF	Workflow: Docking Container for Administration Functions	SWL	BASIS	SAP_BASIS
9	Class	CL_SWL_PROCESS_LOG Method: GET_SWWWIHEAD_SINGLE	Selects workflow log data	SWF_PLOG	BASIS	SAP_BASIS
10	Class	CL_SWL_SUBSTITUTION Method: ADOPT_SUBSTITUTION	Functions for Substitution	SWL	BASIS	SAP_BASIS
11	Class	CL_SWL_SUBSTITUTION Method: END_SUBSTITUTION	Functions for Substitution	SWL	BASIS	SAP_BASIS
12	Class	CL_WAPI_WF_TOOLBOX Method: HANDLER_TOOLBAR_FUNCTION	Actions on Work Item During Execution	SWL	BASIS	SAP_BASIS
13	Class	CL_WAPI_WF_TOOLBOX Method: HANDLER_PROTOCOL_HTML	Actions on Work Item During Execution	SWL	BASIS	SAP_BASIS
14	Class	CL_WAPI_WF_TOOLBOX Method: HANDLER_PROTOCOL_GRID	Actions on Work Item During Execution	SWL	BASIS	SAP_BASIS
15	Class	CL_WF_SWL_SHOW_WF_EASY_MODE	WF: Shows Workflows for Object Instance	SWL	BASIS	SAP_BASIS
16	Class	CL_WLF_OUTBOUND_EVENT_HANDLER	AB: Outbound event handler	WZRE	APPL	SAP_APPL