SAP Message WL860 - The callback function module must be set for work items of type E

Diagnosis When a wait step work item (type E) was created, the parameter for thecallback function module for the callback to the workflow manager (WFM)was not set. However, this parameter is mandatory for work items ofthis type as opposed to all other work item types. System Response Creation of the work item was terminated. Procedure When you create a wait step work item, always specify a callbackfunction module. Make sure this corresponds to the required interface.As an example, consider the interface of the function moduleSWP_CALLBACK_WI_DONE.