Programmatic read access to (conditional disable) symbols in project

Hi,
I'm wondering if there's a way to achieve programmatic way to achieve a read access to the symbols defined within a project apart from the conditional disable structure? I have tried access via VI server, but haven't succeeded
For me, it would be a nice way of passing certain enviroment settings....
Thanks a lot!
Oli
Sorry this should've been posted to the LabVIEW board....
Message Edited by Oli_Wachno on 04-12-2007 03:13 PM
Programming languages don't create bad code, programmers create bad code....

Unfortunately there is no other way to access the symbols via VI server. It is not possible to edit these symbols at runtime in general, which would not make sense, because these symbols are ment to give the user the opportunity to do conditional compiling, and so the state of these symbols needs to be set BEFORE the VI is compiled/started.
You could accress the value of these symbols, by reading the .lvproj File directly. The .lvproj files are XML-Files, and there is a item called
<Property Name="CCSymbols" Type="Str"> .XXX.</Property> in the XML File. The XXX stands for the name and value of a symbol.
You could use File I/O functions to access these values.
Hope this helps!
André

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Programmatic read access to project symbols

Hi,
I'm wondering if there's a way to achieve programmatic way to achieve a read access to the symbols defined within a project apart from the conditional disable structure? I have tried access via VI server, but haven't succeeded
I'm (still ) using 8.20.
For me, it would be a nice way of passing certain enviroment settings....
Thanks a lot!
Oli
Programming languages don't create bad code, programmers create bad code....

I know this is an old thread, but I'm betting that more people will want to know how to do this, and it's not all that intuitive. I wrote a VI that gets symbols for the project itself, or for a target within the project, including "My Computer." I haven't written a VI to set symbols yet, but it's the same idea except that you'd use the "Set Tag" method instead of "Get Tag."
This one is in LabVIEW 8.6.1, just because that's what I'm using today. (Sorry, no LabVIEW 2009 snippet)
Jim
Attachments:
Get Conditional Disable Symbols.vi ‏20 KB

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thanks for the info.
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I need to programmatically change what a conditional disable structure will execute at runtime. (See this thread for more details if you're interested.) As far as I can tell the only way to do this is to change the value of a project symbol at runtime.
I've tried to find a property that allows me to do this but so far it eludes me.
Anyone know how to do it?
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CLDEach snowflake in an avalanche pleads not guilty. - Stanislaw J. Lec
I haven't failed, I've found 10,000 ways that don't work - Thomas Edison
Beware of the man who won't be bothered with details. - William Feather
The greatest of faults is to be conscious of none. - Thomas Carlyle

This is definetly not possible. When the conditional disable structure is compiled, only the actual case is compiled. The other cases don't even have to have valid code, they can have broken wires or bad VI's in them!
Like Mike suggested, you need to load VI's that do the task dynamically.
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Build application with conditional disabled VI's still tries to load them ...

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we have a big LV-project with some "conditional disabled" or with a "switch" unused VI's. But LabVIEW still tries to load them when building an application (even when they are not used). Is there a setting to prevent this behavior? Something like "ignore unused/missing VI's during built"?
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The difference is disable structure and Conditional disable structure. unconditionally disabled code can be broken as it cannot run. Compare that to a case driven by a constant- the unreachable code is removed by the optomizer in certain conditions (We won't guess what conditions prohibit this optomization and it has been changeing a lot since 8.6 to 2013 I imagine it will continue to evolve) however, Because the optomization is not garanteed to occurr the unreachable code cannot be broken. This is simillar to the conditional disable symbols- they are not evaluated untill runtime and the condition may depend on variables external to LabVIEW. So, all cases must be compilable.
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Hi all,
we have following problem.
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<i>It seems, that this is not working, because the function module for the BTE belongs to another function group.
So I can not assign (PROGRAM)FIELD to a field symbol.</i>
With this way you can assign it even if it's in a different Function group, program, whatever if it's in the memory!!!
Debug this example to understand how this approach works.
In this case you can get a value from program SAPLSFES, which has no relation with program ztest_external at all.
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What are the valid values for CPU in conditional disable structure config?

After diggin' around for some time (but to no avail)...
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We currently have a rather large project with two different versions. A conditional disable is used to select what code should be executed based on a project variable selecting the version. Since the new version is ready to be released to other users, we would like to separate the project into two projects on different computers: one for critical bug fixes for the old code, one for the new code. Therefore we want to remove the conditional disable structure everywhere, but doing this manually would take a considerable effort. Is there any way we can do this through VI Server?

I don't suppose there is a built in way to do this, but using VI scripting you can go through you hierarchy and call the Remove Structure method on all of these. If you want more details, go look in the LAVA forums scripting forums.
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Programmatic read access to (conditional disable) symbols in project

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