FRCDiagnosticWindow Error 1 at InvokeNode.vi

When running the FRCDiagnosticWindow.lvproj, we select the “Run Diagnostic Window” button, the Deployment Progress window opens and reports errors. When we close the window we get the error message:

Error 1 occurred at InvokeNode in PC.vi
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.

cRIO has image v19.
Any idea what might cause this?

Thanks
Patrick Holmes
Mentor, Team 3189

These errors are the important one, not the one you posted. The one you posted only reports that there was errors during deployment.