String position2 = "Position Two";
String position3 = "Position Three";
WSIFPort port = service.getPort(portName);
WSIFOperation op = port.createOperation("mixMimeParts");
WSIFMessage in = op.createInputMessage();
WSIFMessage out = op.createOutputMessage();
WSIFMessage fault = op.createFaultMessage();
in.setObjectPart("position1", position1);
in.setObjectPart("file1", dh1);
in.setObjectPart("position2", position2);