Agilent ag3446x error -420, "Query UNTERMINATED"

[tcarrico]

Hi, I'm wondering if anyone else might have seen this error on this DMM?  If so, how did you resolve it?  I'll attach my code.  This doesn't happen on a regular basis, so I'm not sure what is causing it.  I don't miss/loose any data when it occurs, but it's annoying.  I'm using the IVI driver.

[RTSLVU]

Well overall I have never had good luck with IVI drivers, and if something does not work you can not fix it yourself.

Have you tried the standard SCPI driver?

 Agilent 3446X Series Meter Plug and Play (project-style) Instrument Driver

[tcarrico]

Yes, the standard drier works without an error for the VI I submitted.  I have been using the IVI driver because it has some different options that the standard driver doen't have in it.  I think I may have to use IVI for part of my project and the standard for the other.

[billko]

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@tcarrico wrote:

Yes, the standard drier works without an error for the VI I submitted.  I have been using the IVI driver because it has some different options that the standard driver doen't have in it.  I think I may have to use IVI for part of my project and the standard for the other.

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Apparently it has the option to throw errors, too.  😉

If you dig out the programmer's guide you could probably fill in the missing options yourself.  🙂

[JÞB]

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@billko wrote:

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@tcarrico wrote:

Yes, the standard drier works without an error for the VI I submitted.  I have been using the IVI driver because it has some different options that the standard driver doen't have in it.  I think I may have to use IVI for part of my project and the standard for the other.

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Apparently it has the option to throw errors, too.  😉

If you dig out the programmer's guide you could probably fill in the missing options yourself.  🙂

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If you can edit the source code!

One of my pet peeves is the lack of being able to see- much less edit- IVI driver source code.

My advice: use the VISA Project Style (Plug-N-Pray[SIC]) driver and use the"Submit Feedback on this driver" button often.   

[billko]

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@JÞB wrote:

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@billko wrote:

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@tcarrico wrote:

Yes, the standard drier works without an error for the VI I submitted.  I have been using the IVI driver because it has some different options that the standard driver doen't have in it.  I think I may have to use IVI for part of my project and the standard for the other.

---

Apparently it has the option to throw errors, too.  😉

If you dig out the programmer's guide you could probably fill in the missing options yourself.  🙂

---

If you can edit the source code!

One of my pet peeves is the lack of being able to see- much less edit- IVI driver source code.

My advice: use the VISA Project Style (Plug-N-Pray[SIC]) driver and use the"Submit Feedback on this driver" button often.   

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I thought he said he was using a mixture of the two.  I meant that he could probably go with the VISA Project Style and suppliment with some manually written stuff.

[RTSLVU]

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@tcarrico wrote:

Yes, the standard drier works without an error for the VI I submitted.  I have been using the IVI driver because it has some different options that the standard driver doen't have in it.  I think I may have to use IVI for part of my project and the standard for the other.

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What is the SCPI driver missing that the IVI driver has? Chances are the SCPI commands are in the manual you will just have to make a vi to do it.

I just ditched the IVI driver for a Chroma DC Load yesterday after wasting a week trying to use their poorly documented IVI driver that flat out does not work. 

I took me about four hours with the manual to write a few VI's using the SCPI commands to get the job done.

[Dennis_Knutson]

I try to avoid IVI add much as possible as well. If you do use it, you really need to have a copy of LabWindows/CVI on hand. That's one of the reasons I buy the developers suite.

[WhiteWang]

Hi, if you have LabWindows at hand, you can modify the ag3446x_ReadMultiPoint function in ag3446x.c file by using the SCPI command "READ?" instead of calling the low level function ag3446x_FetchMultiPoint and rebuild it.

Otherwise, I can made the change and provide the dll for you.