Error -1073807346

[lorry1234]

when I tried to run the Agilent 415X Series Dual Source Sweep Display.vi, always to get the message below,

Error -1073807346 occurred at VISA Open in Agilent 415X Series.lvlib:Initialize.vi->Agilent 415X Series Dual Source Sweep Display.vi

I don't understand what does this mean and how to fix it.

Thanks!

[crossrulz]

"The given session or object reference is invalid"

So did you give VISA a valid resource to connect to?