viewproject history using mksapi jar doesn't return all required fields

Hello, I am trying to run "viewprojecthistory" using mksapi (java api - mksapi.jar version 4.11.3238) but even if I set required fields it doesnt return the values of these fields.

In the response I see only "revisions" as the field returned. (Please find the comment in the code where it fails)

The code looks as follows.

            Command command = new Command(Command.SI, "viewprojecthistory");

            SelectionList selectionList = new SelectionList();

            OptionList optionList = new OptionList();

            optionList.add(new Option("project", mksProjectName));

            optionList.add(new Option("yes"));

            MultiValue mv = new MultiValue(",");

            mv.add("labels");

            mv.add("name");

            mv.add("memberrev");

            mv.add("state");

            optionList.add(new Option("fields", "labels,name,memberrev,state"));

            command.setOptionList(optionList);

            command.setSelectionList(selectionList);

            Response resp = api.runCommand (command);

           for (WorkItemIterator i = resp.getWorkItems();i.hasNext();) {

                WorkItem wi = i.next();

                String labels = wi.getField("labels").getValueAsString();    // Fails, there is no field "labels" in workitem

                String rev = wi.getField("memberrev").getValueAsString(); // Fails, there is no field "memberrev" in workitem

                String state = wi.getField("state").getValueAsString();      // Fails, there is no field "state" in workitem           

            }

What is going wrong here?

regards,

Ratheesh