RS232 problem: LabVIEW not transmitting \03 (ETX) or (sometimes) last byte

Hi there,
I've coded small VIs to communicate with RS232 devices
since LabVIEW v3.x. I'm now trying to write a VI to
talk to an esoteric photon detector. Using a serial
line sniffer, I have verified the serial line setting s
and can communicate with the device using some
simple C programs. However, using LabVIEW, I cannot
get the \03 (ETX) character to be transmitted
properly. The first instance of the ETX character
in a string will always disappear while any others will be transmitted. I've used labview v6.0.2 on
both Windows and Linux and can reproduce the problem.
I think its a serial lne setting but can't for the
life of me find it...
What am I missing?
-Ed

Attached is a VI in LabVIEW 6i that can transmits the \03 character through VISA. This can be verified by running NI-Spy. Hope this helps.
Randy Solomonson
Application Engineer
National Instruments
Attachments:
03.vi ‏14 KB

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ActiveX-ok.PNG ‏10 KB

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RS232 problem: LabVIEW not transmitting \03 (ETX) or (sometimes) last byte

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