The following additional actions must be taken to upgrade to Workflow Server 2.4:
update_WFE_4_0.sqlfor all relative databases.
GetSchemeListmethod which returns a list of schemas the server has was added to the server API.
LogMessagemethods were added to write to the log from outside the server.
WorkflowRuntimeobject which is always accessible in standard Workflow Engine Actions has new capabilities.
runtime.Logger- object - logger to write messages to log.
runtime.LogInfo()- methods to write messages to log.
ExecuteCommandmethod from WorkflowAPI returns information on whether the command was executed and process state after execution (including all process parameters)
IWorkflowRuleProviderto and perform fine-tuning of Workflow Engine was uploaded to GitHub