OK, attached are two workflows. Save them in the same folder in your KNIME workspace.
Report_Workflow.knwf (12.3 KB) generates the report (in this case, a very very simple report!), and is called by executing the second workflow:
Report_Name.knwf (9.6 KB), which runs it, and saves the report to whatever location you put in the Table Creator node in it.
If you are running on a KNIME Server, then replace the Call Local Workflow with a Call Remote Workflow node
Steve