connection to serial port via USB adapter- error -2147221503

[Jeff Juzeau]

I am trying to drive a stepper motor provided with possible Labview or VB programs. This motor is supposed to be connected via serial port, but the computer has not some, so I bought an USB adpater to connect my motor via USB. I am using the labview programs provided (Labview 8.0). The program cannot connect to the port and returns error -2147221503. Where may I find some help with that ?

Thanks

[Dennis_Knutson]

I see references to 'Luminos'. Is this the provider of the stepper motor and LabVIEW code? If so, your first step should be to contact them. The whole VI is nothing but ActiveX properties and methods and the vendor would be the only one who knows what is going on.

[Jeff Juzeau]

thank you for that I thought the error number may give my any kind of information, but I definitely need to contact my provider anyway!

[RavensFan]

The error is occurring between (5) and (6) on the VI Invoke Node Connect/Source.  However, nothing is connected to "Source".   Do you need to wire something into this terminal in order for Invoke Node to work?