Serial port doesn't work in installed application

I have a simple vi that reads serial data coming from a device, using the VISA Configure Serial Port vi. The development vi and the executable (.exe) versions work fine on my laptop, but when I install it on another computer, the serial port sees no data and there is no error message. All com port settings are the same between the Configure vi and both computers. I built a stand-alone application then built an installer, then installed it in the second computer and ran the setup.exe. The vi opens and works in every respect except for the serial port. What am I doing wrong?

Is the COM port you have selected correct? Are the error clusters in your application all connected so an error will be reported if it occurs?
Mike...
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"djb" wrote in message news:[email protected]..
> I'm having trouble communicating with a transducer (Keyence LS-3100
> laser scan micrometer) via the serial port. It works in
> Hyperterminal. Any suggestions?
>
> Its not a simple baud-rate or parity error. If I issue the command to
> send data (X1) in hyperterminal I start to get data. If I then switch
> to Labview I still get data. However if I try to issue the send-data
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Serial port doesn't work in installed application

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