VISA unable to communicate with or see RS232 serial com port

[Robert_Collins_(Heriot-Watt_University)]

 I have a Dell Optiplex GX260 which has recently had Windows XP (Service Pack 2) re-installed on it.  National Instruments VISA is unable to communicate with the single RS232 serial com port on the computer.  Neither the "VISA Resource Name" control in LabVIEW 8.5 nor the "Measurement and Automation Explorer" can see the serial port.  Refreshing the list does not help.  "HyperTerminal"is able to both see and communicate with instruments connected to the serial port.  In Windows "Device Manager, the serialport appear in the list of hardware without any warnings.

Can anyone please help with suggestions as to how I may be able to get VISA in LabVIEW to 8.5 to see and communicate with the serial port?

System Details:

Dell Optiplex GX260 (One RS232 serial port)

Windows XP Home Edition Service Pack 2

LabVIEW 8.5

[smercurio_fc · Accepted solution]

I had this happen to me once. In my case I updated to the latest version of VISA and that fixed the problem.

[Robert_Collins_(Heriot-Watt_University)]

Upgrading to the latest VISA via the link you provided solved the problem.  Many thanks smercurio_fc.

[Preetisar]

I am facing a similar problem.

I am getting this eror.

Error -1073807246 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi->Basic Serial Write and Read.vi

Possible reason(s):

VISA:  (Hex 0xBFFF0072) The resource is valid, but VISA cannot currently access it.

Can anyone please tell how to fix this??

Thanx.

[RavensFan]

Does another program have the serial port open at the same time?  If so, close the serial port in the other program.

[smercurio_fc]

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@Preetisar wrote:

I am facing a similar problem.

I am getting this eror.

Error -1073807246 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi->Basic Serial Write and Read.vi

Possible reason(s):

VISA:  (Hex 0xBFFF0072) The resource is valid, but VISA cannot currently access it.

Can anyone please tell how to fix this??

Thanx.

---

And please don't post the same question in multiple threads. It is very irritating and will soon put you on the "ignore this person" list.

Also, next time do a search. That error code has been asked about dozens of times and the answer is always the same.

[Preetisar]

Did I commit such a big crime that I am having to hear such a rude comment from you and be warned to be put in the ignore person list? 

I accept its my mistake, that I didnt do a search but posted a question straightaway, and that I shouldnt post the same question in multiple threads.

But your point could have been put forward in a milder manner.

My sincere thanx.

And yeah sorry, I had another application open in Labwindows which was using the same com port.

Thanx to all who helped me with this. 🙂

[AKA_TG]

Just passing by but I gotta say

Guyts who answer like that do really irritate me

Someone oughta apologize to the porr guy trying to get some help here.

Go ahead and put me on your ignore list please!

\

[smercurio_fc]

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@AKA_TG wrote:

Just passing by but I gotta say

Guyts who answer like that do really irritate me

Someone oughta apologize to the porr guy trying to get some help here.

Go ahead and put me on your ignore list please!

---

First, there is a plethora of messages on this forum and a plethora of information in the NI KnowledgeBase. If someone doesn't make the simple effort to take 5 minutes to perform a search what does that say? The issue being raised has come up, literally, dozens of times. Do you like answering the same question over and over and over and over and over again?

Second, my feelings are not unique. You will find that the irritation of people not bothering to do a simple search is shared by most of the regulars here. Why do you think search engines are available? Just so that ads can be sold?

Third, posting the SAME question in multiple threads is self-defeating. People who try to answer don't know what's already been suggested, and end up wasting their time as well as the poster's time in providing the SAME answer and/or suggestions that were provided in the other thread. 

Fourth, simple forum netiquette. In both threads the poster essentially hijacked someone else's thread. This is frowned upon in just about every forum that I've ever seen.

[Preetisar]

I am not disagreeing with your points.....

Its just about the manner in which you put them.

When u have an option to be nice to other people, then y not??

Besides your point doesnt get any stronger by being rude.....

And I guess enough space has been used in the forum for things it is not intended for.

I am responsible for that too, so sorry for that.

If possible please do not reply to this.

Thank You.