User`s guide

6. Wire the output of the UnbundledByName VI to the input of the ErrorMassge data terminal to
display messages in the Front Panel.
7. Press the Run button to execute Tutorial 4 program. You will find that the Error Message block
at the Front Panel is blank. But if you delete the wiring between the DeviceOpen VI and the
DIOReadPortByte VI, you will get an error message in the Error Message block.