Save Labview Class to file?

Hi there,
I am playing around with the new Labview classes and i am thinking working with classes is pretty cool.
But i am not able to save the objekt to a binary file load them and use this data to initialize the Object with this data.
Its no problem write the state of Class to a binary file oder flatten the state to XML.
But i got a lot of troubles load them back.

I changed the example so that it works.
Please have a look.
Attachments:
saveclassdata.zip ‏37 KB

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This VI is part of a LabVIEW class. No part of the class is executable at this time because one of the member VIs is missing. However I am not missing a vi

I only have 1 vi and its not missing. The 1 vi claims the owning library has blocked the execution of the VI. The class has the error "This VI is part of a LabVIEW class. No part of the class is executable at this time because one of the member VIs is missing. Find the missing member VIs on disk and load them into memory or delete them from the class definition in the project tree."
But there is only 1 member vi!!??
I had lots of other vi's as part of this class but somehow this class got botched with this error. I removed all vi from the directory and from the class definition and re made just the one assessor vi and still got the error message.
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Attachments:
Tree class.zip ‏14 KB

I cannot tell you why. Only what it is missing.
If you look in the Tree.lvclass file using something like Notepad, towards the bottom you will see some XML that looks like:
<Item Name="Untitled 1" Type="VI">
        <Property Name="NI.ClassItem.ConnectorPane" Type="Bin">#1#!!!!!!!)!"1!&!!!-!%!!!@````]!!!!"!!%!!!$H!!!!#1!-1#%'=X2B>(6T!!!,1!-!"'.P:'5!!""!-0````]'=W^V=G.F!!!71&!!!Q!!!!%!!AFF=H*P=C"P>81!"!!!!#*!=!!?!!!/$&2S:75O<(<'&T=Q!!#&2S:75A<X6U!!!A1&!!!Q!!!!%!!B.F=H*P=C"J<C!I<G]A:8*S<X)J!#"!=!!?!!!/$&2S:75O<(<'&T=Q!!"V2S:75A;7Y!0!$Q!!Q!!Q!%!!1!"1!%!!1!"!!%!!9!"!!%!!=#!!"Y$1A!!!!!D1M!!!!!!!!!!!A!!!!!!*!!!!!!!1!)!!!!!!</Property>
        <Property Name="NI.ClassItem.ExecutionSystem" Type="Int">-1</Property>
        <Property Name="NI.ClassItem.Flags" Type="Int">0</Property>
        <Property Name="NI.ClassItem.IsStaticMethod" Type="Bool">false</Property>
        <Property Name="NI.ClassItem.MethodScope" Type="UInt">1</Property>
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        <Property Name="NI.ClassItem.State" Type="Int">1342841344</Property>
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Delete this block. Make a backup of the file before you do that. Start up LV and load the class again.
My guess is that something probably did not save properly when LV shut down. I have a large OO project and have had more than one occasion where I have corrupted the project but could ot figure out why.
Today I had a similar message which is why your post caught my eye. In doing some troubleshooting I found that it no longer 'knew' where one of my files was but it never complained when it loaded the project. I went back to the original project and tried to open that vi from the project. That is when it told me that the vi was not in the expected location, do you want to correct it. I said yes and all was better.
Trying to open all of the VIs in the class might have worked, but this can be cumbersome to say the least in a large class.
Good luck,
Kurt

Hi am trying to save Data into a write to measurement file vi using a NI PXI 1042Q with a real time mode but it is not working but when i run it with uploading it into the PXI it save in to the file

Hi am trying to save Data into a write to measurement file vi using a NI PXI 1042Q and DAQ NI PXI-6229 with a real time mode but it is not working but when i run it without uploading it into the PXI it save in to the file please find attached my vi
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PWMs.vi ‏130 KB

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How do I save a running sequence file

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Hi Lars,
The reason that we can't save the local variables created during
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GetSequenceFileEx and incrementing the Change Count, or create a
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locals to the sequence file from itself isn't possible.
Hope this helps Lars,
Have a good one.
Dan Weiland
Applications Engineer
National Instruments
www.ni.com/support
Dan Weiland

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Record a speech signal and save as a wav file?

Dear All:
I'd like to record a speech signal using one microphone and write/save as a .wav file. Can anyone help me on this issue.
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Jeffrey,
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Sto utilizzando Write to measurement file e ho scelto l'opzione save to series of file (data + ora). Ciò nonostante, il programma, sviluppato con Labview Basic 2009, salva su un solo file test.lvm. Se fermo l'esecuzione e riapro la finestra delle proprietà del write to measurement file, l'opzione selezionata è in effetti save to one file.
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DavideB wrote:
I'm using Write to Measurement File and I chose the option to save series of files (date + hour). Nevertheless, the program developed with Labview Basic 2009, save on one file test.lvm. If you stop the execution and reopen the properties window write to measurement file, the selected option is in effect save to one file.
As I re-select the other option and click OK, the program salted on a single file. Do you have any suggestions? thanks
Non ho una risposta, ma io vedo lo stesso comportamento. Sono riuscito a salvare uno in LV8.6, aprire / salvare nuovamente nel 2009 e visualizzare le funzionalità che ci si aspetta.
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Save image to a file got a blank image.

I need to save graphics image of a component to a file. Following is what I did.
1. Call createImage() from this component.
2. Convert the image to a BufferedImage.
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I am able to get a good image file now. Thanks you very much.
However I still have a few quesions.
1. In my case, the label is visible on the screen, why I need to call the setVisible(true) again?
2. Why use print() instead of paint()?
3. I have to use BufferedImage.TYPE_INT_ARGB to create a new BufferedImage, otherwise the result image file is in black.
4. I did not use the hints because it is very confusing. Fortunately, It worked without them.
Following is a modified version of your code.
import java.io.*;
import java.awt.*;
import java.util.*;
import java.awt.image.*;
import javax.imageio.*;
import javax.swing.*;
public class SaveComponentAsImage
public static void saveComponentAsImage(
                         JComponent c,
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c.setVisible(true);
c.validate();
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c.print(g);
g.drawLine(0,0, c.getWidth(),c.getHeight());
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System.out.println( "Image is saved in file " + fn );
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// cleanup
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I need to capture streaming audio and save to a wav file

I need to be able to capture an audio stream delivered via ethernet using UDP protocol and then save to a wav file.
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Did you do the thing about searching in the example database. Let us use that as base for discussion. Those who put in some effort will be rewarded. Also check out the AU file format http://en.wikipedia.org/wiki/Au_file_format As it is big-endian http://en.wikipedia.org/wiki/Big-endian the numbers can be stored as is in Labview. Must players,matlab, etc can use the AU file format.
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I am in the need for a way to automatically save data to a file for every N-samples that are acquired. I've written the attatched reentrant subVI, but there are some problems. Whenever I have it in my program loop it hogs the process (stalling data acquisition) and just writes the initial values a bunch of times (the file quickly goes into the 10's of megs). I don't know where I'm going wrong in my algorithm.
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My typical sample rate is around 2-5 samples per second. I need this because some of our tests are really long (like hours long), and if the DAQ computer fails to save the final data set then we pretty much lost the entire test.
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Attachments:
Auto Save N Points.vi ‏22 KB

For "automatically saving the data to a file for every N-samples that are acquired", you might have to use LabVIEW measurement file for storing your samples. Also, I have slightly modified your code. Double click on the LabVIEW Measurement file and then check different options available to store your samples. Hope this helps.
PS: Assuming that this is the only probelm you have, I didn't go through your algorithm.
Attachments:
Auto Save N Points.zip ‏51 KB

Save Labview Class to file?

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