LabVIEW Variant Attributes get lost in TestStand?

Hello,
Example code attached.
I'm using a LabVIEW variant as a lookup table by using the attributes (see here: https://decibel.ni.com/content/docs/DOC-25371 (and others)). It works well. When I attempt to pass this variant from one TestStand step to another, I lose the attributes of the variant. I've made a small example to demonstrate this. Am I doing something wrong? Why does the variant retain the value, but not the attributes? Should I store this as another type in TestStand? In the documentation for LabVIEW types in TestStand, it is claimed that a Variant in LabVIEW maps to "Anything" in TestStand. When I tried to use a Boolean, however, I got an error and was instructed to use a Container. Does that container need to have some specific suptype to retain the attributes? Or does it have nothing to do with that?
Thanks in advance

Hey GarryG,
Here is an excerpt from the NI Product Support Engineer's response on this issue:
"Unfortunately, this is a known limitation with LabVIEW variants in TestStand. When LabVIEW variant data is returned to TestStand from a LabVIEW code module, the data overwrites the property. TestStand does not have a mechanism to "fit" the returned variant data to the TestStand type, so unfortunately you will need to either remap the data to the type, or use a cluster rather than a variant."
Essentially, it appears that variant data can not be guaranteed to work properly in TestStand. In order to ensure you have your data passed from your Code Modules correctly, I would recommended following the Product Support Engineer's advice of remapping or clustering the data. If this is not possible, the Flatten Variant to String.vi could be an alternative to try. I was able to confirm that this has not been fixed with TestStand 2014 either.
Typecasting LabVIEW Variants in TestStand Forum Post:
http://forums.ni.com/t5/NI-TestStand/typecasting-Labview-variant-in-Teststand/td-p/2160452/page/2
I hope this helps!

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hello
I want to find the value corresponding to the variable name in a Variant structure. For this purpose I use the "Get Variant Attribute" function, but I do not get any good result : no result in the get value, and also when no string name input is given to get all the attribute of the variant.
where is the bug ?
thank you

Hi,
No bug, Get Variant Attribute returns values you've put in it using Set
Variant Attribute.
Unfortunately there is no way (I could think of) to get the text of a
variant out of the variant in string format.
Regards,
Wiebe.
"hub" wrote in message
news:[email protected]..
> hello
> I want to find the value corresponding to the variable name in a
> Variant structure. For this purpose I use the "Get Variant Attribute"
> function, but I do not get any good result : no result in the get
> value, and also when no string name input is given to get all the
> attribute of the variant.
> where is the bug ?
> thank you

Get variant attribute

I m using LV 6.0.2, the function "get variant attribute" does not work. I
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Any idea?!
Actually I could need exactly the string that is shown in a variant
indicator/control.
e.g.:
'Cluster': cluster of 2 elements
'Array': 1-D array of
'Numeric': double
'Boolean': boolean
'Array' -> (2.000E+0, 2.000E+0)
'Boolean' -> FALSE
Has anybody an idea how I can get this as a string?
Thank You.
Max
-> [email protected] / [email protected] <-
-> Max Weiß * Eulenweg 2 * 76356 Weingarten * Germany <-
-> Fax/Voicebox: 0180 505254775181 * Tel: +49 162 9114507 <-
-> ICQ: 123429315 * DB 8 MWE <-

The reason you can't get an attrivute of the vairant is because your variant doesn't have any. Use "Set Variant Attribute" to add an attribute to your variant, and then you should be able to read it back later using the "Get Variant Attribute".
cheers,
Christopher
Copyright © 2004-2015 Christopher G. Relf. Some Rights Reserved. This posting is licensed under a Creative Commons Attribution 2.5 License.

Get Variant Attribute Should Search for and return multiple values based on RegEx

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FALSE

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from grc_dist_factura dist
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, grc_det_dist_factura det
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<Item Value="HorasNormales"/>
<Item Value="HorasRecargo"/>
</AttrNames>
<nodeDefinition DefName="gsgappl.grc.datamodel.view.confTarifa.GrcConfTarifaRaizView"
id="GrcConfTarifaRaizViewNode">
<AttrNames>
<Item Value="IdSimcot"/>
<Item Value="Descripcion"/>
<Item Value="Tipo"/>
<Item Value="HorasNormales"/>
<Item Value="HorasRecargo"/>
</AttrNames>
<Accessors>
<Item Value="ClientesView"/>
</Accessors>
</nodeDefinition>
<nodeDefinition DefName="gsgappl.grc.datamodel.view.confTarifa.GrcConfTarifaClientesView"
id="GrcConfTarifaClientesViewNode">
<AttrNames>
<Item Value="IdCliente"/>
<Item Value="Descripcion"/>
<Item Value="IdSimcot"/>
<Item Value="Tipo"/>
<Item Value="HorasNormales"/>
<Item Value="HorasRecargo"/>
</AttrNames>
<Accessors>
<Item Value="RegionalesView"/>
</Accessors>
</nodeDefinition>
<nodeDefinition DefName="gsgappl.grc.datamodel.view.confTarifa.GrcConfTarifaRegionalesView"
id="GrcConfTarifaRegionalesViewNode">
<AttrNames>
<Item Value="CodRegional"/>
<Item Value="Descripcion"/>
<Item Value="IdSimcot"/>
<Item Value="IdCliente"/>
<Item Value="Tipo"/>
<Item Value="HorasNormales"/>
<Item Value="HorasRecargo"/>
</AttrNames>
<Accessors>
<Item Value="CiudadesView"/>
</Accessors>
</nodeDefinition>
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id="GrcConfTarifaCiudadesViewNode">
<AttrNames>
<Item Value="CodCiudad"/>
<Item Value="Descripcion"/>
<Item Value="CodRegional"/>
<Item Value="IdSimcot"/>
<Item Value="IdCliente"/>
<Item Value="Tipo"/>
<Item Value="HorasNormales"/>
<Item Value="HorasRecargo"/>
</AttrNames>
</nodeDefinition>
</tree>
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Can any one help me please?
bye

Thanks for the links.
I checked them up, but first, I noticed they apply to adf 11g, and second none of them use inputText in columns. I really couldn't find a any idea to solve my issue.
Any other suggestions?
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thank you.

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Using LV8.5 and TS 4.0.1
Message Edited by Michael Aivaliotis on 02-11-2008 02:12 AM
Michael Aivaliotis
VI Shots LLC
Attachments:
LV Variant2.zip ‏27 KB
2.png ‏21 KB

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LabVIEW Variant Attributes get lost in TestStand?

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