Linux serial access problem

I'm running Labview 6.1 on Linux.  The vi I want to run loads properly, but does not seem able to access the serial port.  The default port is com1 (the vi was written on a Windows system I believe), and occasionally ASRL1::INSTR and ASRL2::INSTR show up in the drop-down box.  I can select ASRL1, but it usually reverts to Com1, and then the ASRL's aren't on the list anymore.
I have run NIvisaic, which looks like the ports are properly setup, and I do have permissions correct.  I have a port tester connected, and RTS and CTS do toggle when I select ASRL1, but when I try to send data using the "Basic IO" function, nothing is sent.  Any ideas?
Thanks

Hello rhauff,
I understand you are having trouble communicating through serial in Linux. Which Linux distribution are you using and what version of NI-VISA do you have installed?
What exactly is happening when you run your program? You mentioned that it works for 5 seconds but then stops. What is happening when it stops? Are there any errors being thrown?
Also, I think it would be most beneficial to try using a basic serial example in LabVIEW (Help » Find Examples) to see if you can get it to work. Navigate to Hardware Input and Output » Serial » "Basic Serial Write and Read.vi". It would also be helpful to perform an NI-SPY capture when running the program to help troubleshoot what is happening. For information on using NI SPY for Linux, please look here. There is also another resource for troubleshooting serial communcation in Linux which can be found here. Hope this helps,
Daniel S.
National Instruments

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