Unflatten From String Not Functioning in Mobile Module 2011

Mobile Module does not get updated since version 2011. I am not sure my question will be solved.
I have been using Simple Messaging Reference Library (STM) for a couple of years. I use them in my Mobile Module code too. It has been working fine until lately I updated to the latest version of STM.
I noticed that 'Read Message (TCP).vi' was not functioning properly in the Mobile Module code. After a long debugging, I found the source of the problem. 'Unflattern From String.vi' does not work in Mobile Module any more. I did a test as shown above.
My questions are
1). 'Unflattern From String' was changed so it is not supported in Mobile Module 2011?
2) Why the same code worked before, but not now?
I use LabVIEW 2011 and Mobile Module 2011. Thanks.

MengHuiHanTang wrote:
Mobile Module does not get updated since version 2011. I am not sure my question will be solved.
I have been using Simple Messaging Reference Library (STM) for a couple of years. I use them in my Mobile Module code too. It has been working fine until lately I updated to the latest version of STM.
I noticed that 'Read Message (TCP).vi' was not functioning properly in the Mobile Module code. After a long debugging, I found the source of the problem. 'Unflattern From String.vi' does not work in Mobile Module any more. I did a test as shown above.
My questions are
1). 'Unflattern From String' was changed so it is not supported in Mobile Module 2011?
2) Why the same code worked before, but not now?
I use LabVIEW 2011 and Mobile Module 2011. Thanks.
Is that the real code or just a mockup to demonstrate the issue? I'm asking because the code is set up to run once and then wait until the stop button is pressed. Then the VI will complete and exit. Is the the desired behavior?
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

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Whats happening internally within the unflatten from string function?

I am getting unflatten from string error intermitently in my program. I can't post the program to get help but essentially I am storing a GOOP object reference as a string. The reference is flattened to a string and stored upon creation, at a latter time the string is then unflatterned to retrieve the reference and then the data. This works most of the time but occansionaly the unflatterned from string function fails. Prior to passing the string to the function I am checking that the string isn't null. I am assuming something else is corrupting the string prior to passing to this fucntion and would like to know what would trigger the error in the function as it may help me realise what is happening
prior.
Cheers,
Wayne

Hi,
It really seems strange this problem, but one thing that might be the cause is how you store the flatten string. You do not mention that. I have once had problems when storing GOOP references as a sting and passing them between test VIs in TestStand using a string parameters in TestStand. A flatten string might have special chars that not all applications (such as TestStand parameters) can handle that and just trunkate the string when such a char is present, mistakenly inteprets that as end of string. Have you tried to check that string length is the same?
However to make sure you get rid of all problems with string termination, you really should cast your GOOP reference into something else. I would instead cast the reference to an U32, or
if you want, to solve the string problem for other types than GOOP reference, then flatten the type into string and then convert the string to an array of U8 before storing it. This would by sure solve your problem.
Regards,
Mattias Ericsson
Endevo
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I am working on a problem for some hours now and I need some help.
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I tried to reproduce the matter, but couldn't.
I attached my example to the post.
What it does:
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In the second case the same file is read and the number broadcasted to a variable.
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Hi All,
I am running into an issue where "Unflatten from String" is taking enormous amout of memory n time in LV 2012 SP1 x64 to execute. I pass in a NOT flattened string to this function and it consumes ~5 Gigs of memory and takes more than 10 minutes to execute it. On x86, it executes almost instantly.
It only happens if the input is not a flattened string.
Is this a known bug?
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Attachments:
Flat String to Data bug.vi ‏9 KB

LVCoder wrote:
With "x64" I meant LV x64. It executes instantly on LV x86 running on Win 64 bit but on LV x64 it takes like eternity.
I know it cannot unflatten it and I want it to return an error. My actual code can receive a flattened or NOT flattened string and I have a case structure which handles different strings differently.
Be careful with that terminology, it only applies to the Windows Operating System with respect to 32-bit and 64-bit processors. There is no such thing as LabVIEW x64, or LabVIEW x86. The property terminology is LabVIEW 32-bit (the most common one, most people use, even on 64-bit OS's since it is the most fully supported), and LabVIEW 64-bit (not commonly used, doesn't have full support of all add-on modules and toolkits, and is mainly only used by people who need LabVIEW to analyze very large datasets.)

How does "Unflatten From String" take a type and return a value of that type?

http://zone.ni.com/reference/en-XX/help/371361E-01/glang/unflatten_from_string/
How exactly does the "type" argument for "Unflatten From String" work? I need to create a VI that takes a type, passes it as an argument to several calls of the "Unflatten From String" function, and returns an array containing elements of the type originally passed. The "Unflatten From String" function seems to do some magic though, because the type of the "value" that it outputs changes depending on the type it is passed as input. How do I do the same magic in my VI?
Ultimately, what I need to accomplish is an unflatten-list operation. Given a type T and a byte string of length L (which contains a concatenation of T elements that are flattened to their bytes), create a VI that unflattens all the types in the string and return an array of length (L / sizeof(T)) that contains each type.
Note: performing the unflatten-list operation is trivial, but I cannot for the life of me figure out how to do it in a VI that takes a type and returns an array of the appropriate type. By the way, my data is being given to me from another source, so please don't bother suggesting that I should be flattening an array using LabVIEW's "Flatten To String" function in the first place. My data is not given in LabVIEW's array format: http://zone.ni.com/reference/en-XX/help/371361B-01/lvconcepts/flattened_data/
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Error 116 at Unflatten from string.....

Hi I want to save and load the control values of
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the attached is the VI can
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Attachments:
save n load example.vi ‏70 KB

All that you need to do is right-click on the Read from Text File and Write to Text File functions and uncheck "Convert EOL".
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You should not hard-code the path inside the VI. Either place a front panel control to specify the path (perhaps with a default value set), or generate the path so that it is relative to the VI (such as being in the same directory as the VI).
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Attachments:
f_mancalib_UnflattenTypeCalibList.vi ‏184 KB
f_mancalib_TypeCalibrationParams.ctl ‏24 KB
f_mancalib_TypeCalibrationList.ctl ‏28 KB

Hi,
From the LV's help: "National Instruments recommends reworking any
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definition wrapper. If you do not want to strip this wrapper, right-click
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Regards,
Wiebe.
"albertz" wrote in message
news:[email protected]..
I allready told this to a NI tech support in Germany. They told me,
the bug is known, but they do?nt have a workaround.
So I hope for LV7.1 or maybe LV7.01.
[Attachment Different Types.vi, see below]
Attachments:
Different_Types.vi ‏22 KB

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Shoaib Akhtar wrote:
Thanks for the reply!
Restricting the TCP sent dta to two bytes was a mistake, that has been rectified.
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Best.
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Message Edited by rolfk on 01-11-2010 08:37 AM
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Unflatten From String causes runtime error in LV2009

I found this error when trying suggestions made in this thread.
http://forums.ni.com/ni/board/message?board.id=170&thread.id=458335
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Attachments:
Unflatten runtime error.vi ‏8 KB
error1.jpg ‏13 KB

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vis.zip ‏43 KB

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Hello,
My name is Joshua and I am from the FIRST Tech Challenge Team 4318, Green Machine. We are trying to write a program that will write to a configuration file and read it back. The idea is that we will be able to write to a config file from our computer that will be read by our autonomous program when it runs. This will define what the autonomous program does.
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Attachments:
ReadableTest.vi ‏20 KB

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Unflatten From String Not Functioning in Mobile Module 2011

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