MATLAB script in executable

I made an exe out of a VI that uses a Matlab script. When I run the exe, I get a 1047 error (failed to send variable to script server) even though that error does not appear when I run the VI. I looked at the knowledge base document 1JNEPGU0 and did what it suggested, even though I shouldn't have to since I am on LabVIEW 6.1. I also am using the updated matscript.dll, per knowledge base document 300A6NDT (the VI did not run until I updated this.)
My software is Windows XP, LabVIEW 6.1, Matlab 7.0.4 (R14)
Thanks!

Hi Nick,
I think you are well aware that you indeed CAN interface with MATLAB 7.0 (R14) from LabVIEW 6.1 - that is part of what the KnowledgeBase 300A6NDT
covers. Since you already got that working in the Development System,
the issue must be caused by the fact that you are using an executable
in stead of a VI. Did you follow the instructions specific for executables:
"If using the MATLAB or Xmath Script Nodes
in built applications you will need to also replace the appropriate
DLLs located in the National Instruments\Shared\LabVIEW Run-Time\VERSION\script directory."
If you already did that, we must look elsewhere for a solution. The
following KnowledgeBase also covers an issue with executables and
MATLAB:
Why Does My Executable Hang When It Is Opened When I Use A MATLAB Script Node?
If this doesn't work, please let me know the following:
Are you running the executable on the computer that has the Development System installed?
Is MATLAB open when the executable is called?
What instructions are you using to build the executable?
Hope this helps!
- Philip Courtois, Thinkbot Solutions

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Matlab script in executable won't run

I'm having trouble with getting a VI with a MATLAB script to run reliably, specifically when built into an executable.
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If I build an executable and run it, it works, so long as I haven't closed LabVIEW and the VI.
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Hi tblir,
Can you try to run and build into an
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Hi
I'm using LabView 6.1 and Matlab 6.5. I have a VI that starts a simulator made in Matlab/Simulink. I need to execute a function in a matlab m file, and I'm using the Matlab Script node to do this. The problem is that the code only executes occasionally. Is there no guaranty that all code in Matlab Script is executed, or am I using it wrong?
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You may want to take a look at this Knowledge Base on NI's website. It providess an update for using Matlab 6.5 scripts with LabVIEW 6.x.
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Error occured while executing Matlab script

Hello!
I want to run a Matlab script under LabVIEW, but there is always
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Matlab syntax errors are not caught and reported when code is executed in a LabVIEW Matlab script node

I want to be able to catch errors that occur during the execution of Matlab code in a LabVIEW Matlab script node. According to my understanding of the documentation, errors of this type should be available at the "error out" signal point on the Matlab script node. I have noticed that even deliberately generating matlab syntax errors will not produce an error output. See the attached vi for an example.
Attachments:
matlab.vi ‏13 KB

I ran your example VI and the is what I got in the Error Out cluster:
"Code 1050
Error occured while executing script. Error message from server: ??? This is an error
. in matlab[1].vi"
If you are generating custom error messages in Matlab I would suggest passing them back to LabVIEW through output variables in the script node.
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Matlab script of labview keeps executing multiple times,

i have some code for serial communication in matlab , i want to use it in labview for easier and better gui design. for that i have used matlab script node in labview. it seems that labview keep executing the matlab script but i want labview to execute it only once.is there any way to do it?
Solved!
Go to Solution.

i am attaching a vi file. this vi sends 'h' to the com1 continuously but i waant it to send only once.
Attachments:
forum.vi ‏7 KB

Executing MatLab script

Hi guys!
I'm using TestStand to log a bunch of data and save them as binary files. When the test is finished I would like to run a matlab script. At the moment I do this manually, just opening MatLab and changing the path that the script uses to find the particular set of binary files from the test.
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Any ides to what is the best approach?
Thank you for your time!
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You'd be better off posting this question in the TestStand forum, since this is really a TestStand question. In fact, all of your other questions have actually been in the TestStand forum. As far as doing this using a LabVIEW VI, sure you could do it. The VI would contain just a couple of lines of Matlab code to call the script, I suppose. You could also use the Matlab COM server to call Matlab that way. That's how the LabVIEW interface works, so you can just cut out the middle-man, so to speak.

Retrieving data from a MATLAB script node

I am creating a VI that imports and manipulates arrays of data points and then plots them in Labview. When I run my Matlab script in Matlab there are no errors and all the assigned variables exist in the form that they should exist but for some reason Labview cannot retrieve all of them (they just show up as zeros). There are no errors in the script as far as I can tell. Do you have any idea what could be going wrong?

Hi,
You can use the MatLAB window opened by LabVIEW to debug your script.
Check the values of your variables in the MatLAB window and try to find out where the data goes wrong. I've experienced many problems with LabVIEW MatLAB nodes on different PCs, and many times legal MatLAB operations would go wrong in the script node. You will need to find out which line exactly does your MatLAB code not executing correctly and try to modify the MatLAB codes from there.
Hope this help,
Dan

Matlab script no longer works after upgrade of matlab

First of all im using labview 7.1.1 to execute a vi which uses some labview scripts to do the bulk of the number crunching and labviews excellent interface.
The problem happened when i recently was forced to use Matlab 7.1 R14 SP3 because some of my other routines required this. After i had upgraded matlab and tried to run the labview vi, all i keep getting is an error no. 1050 from the matlab script object.
Now the most infuriating thing about this is that it is such a non descript error, i mean , what does it actually mean? and as such i dont even know where to start in solving this problem.
Has anyone solved this problem or indeed had it themselves, im at the end of my tether with it now.
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This is a known problem between different version of Matlab and LabVIEW. Mathworks changed the Matlab interface with version 7, which broke a lot of LabVIEW code. Which version of Matlab were you using before? You can try searching these forums for "matlab error 1050 labview" and you'll see what I mean. Typically he problem is the version of the matlab.dll that's in the LabVIEW installation directory. You can try the stuff suggested in this article.

Using '!' in matlab script

It seems unable to invoke the '.EXE' file in the matlab script node.
In my matlab code I use '!' to invoke a .exe file, it can be execute in matlab, but when I copy the same code to labview(matlab script node), it does not work
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LabVIEW: Error occurred while executing script. Error message from server: Warning: Name is nonexistent or not a directory: D:\Wastewater_experiment\programCodes\DymolaFiles.
> In c:\matlab6p5\toolbox\matlab\general\path.m at line 116
In c:\matlab6p5\toolbox\matlab\general\addpath.m at line 88
< c:\matlab6p5\bin\win32\dsu.txt created.
... Error message from alist
Error opening file "dsin.txt": No such file or directory
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Unable to read MAT file temp.mat: not a binary MAT file.
Try LOAD -ASCII to read as text.
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I am sure I have add all the path. and If I just run the code
! alist -a dsin.txt dsintest.mat
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How can I do with this error
Attachments:
labviewmatlab.zip ‏52 KB

Sorry
The problem have solved.
When I invoke .txt .mat .exe in LabVIEW matlab script node, this files should be under '.../matlab' path. I do not kown why it is not '.../matlab/work'.And 'addpath' is useless except to 'invoke .m' files.
It can work now.

Using array as a MATLAB script input in a subVI - labview crashes

Hello
I am having troubles in creating a subVI that includes a matlab file which has an array as an input.
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After the terminals have been assigned, labview instantly crashes when running the file.
I also created a VI to test the subVI, but I couldn't get it to work at all, labview always crashed...
Does anyone know a solution to my problem? They only thing i can think of is to not use it as a subVI, but then my main file will get huge, as all the matlab code would be included in there...
attached are both files, so that you better understand my problem. (test_... is the main file)
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- Jarno
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Solved!
Go to Solution.
Attachments:
test_subVI_array_into_script.vi ‏8 KB
subVI_array_into_script.vi ‏8 KB

Hey Jarno,
I did some playing around with this (sorry for the delay) and another workaround we can use is adding an Always Copy to the array before passing it into the Script Node. This will allow you to continue using Double precision arrays instead of going to Singles.
It looks like there is an issue with the array copy that is passed into the SubVI through the terminal, but we can get around it by making a new copy that the Script Node can properly work with.
Tim A.
National Instruments

Getting error when passing variable to Matlab script

Hi
I am using LabVIEW 2013 Version 13.0f2 (32bit) and MATLAB R2014b (Version: 8.4.0.150421) in Windows 7 Professional Version 6.1 (Build 7601: Service Pack 1).
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Error 1050 occurred at LabVIEW: Error occurred while executing script. Error message from server: ??? Reference to a cleared variable A.
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Error 1048 occurred at LabVIEW: LabVIEW failed to get variable from the script server. Server:"??? Undefined function or variable 'num'.
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The problem occures when I try to access the input, in other words I can have inputs to my script as long as I do not use them.
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Attachments:
MatlabTest.vi ‏7 KB

Thank you so very much.
I shold of cours have realised that that was what happened but I always use the three clearing lines (close all, clear all, clc) in the beginning of a script to make sure that no old and irrelevant data corrupts my script and did not think about when the inputs were generated.
Again, Thank you!

Error 1050 with matlab script

Hi , i'v built an vi which sampling saving and playing audio files , i've also added matlab script for data analysis.
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i think that the error occures whe trying execute the command : "Sigitp = interp1(clptv, clpsig, tv, 'linear'); "
moreover i cant figure how to read the saved filed when the loop is finished.
I cant figure out what is the problem .
here is the vi :
i've also included the vi

Cobmetal wrote:
Im novice to labview , and im learning a lot from NI community , thank you for your suggestion , i will go over it , and try to learn the proper way to implement such tasks in the future.
Thank You.
That's excellent! I believe that if you truly understand dataflow, you will see why your solution isn't the best one. ASK QUESTIONS IF YOU DON'T UNDERSTAND SOMETHING. I put that in bold caps because we are here to help you understand and get better.
Example:
"According to what I learned about dataflow, I think this part of my solution mentioned above can look like this. (Upload picture.) Does that seem right to you?"

Using matlab script

Hello!
I'm using matlab script block in my aplication. The m-file (from matlab) contain an 'if' that depends of an input of labview.
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How can I to impose to pass throug the sequence once the input's value change. It's better to specifie it from matab or from labview.
Thank you in adavance

What is surrounding the matlab script block? LabVIEW should be modifying the matlab code, it should be connecting with matlab and matlab executes its code, returning the results to LabVIEW. Can you do a screen capture of the part of the code that contains the matlab stuff? If yes make sure that it is saved as a .jpg (not .bmp!) for size reasons. If not, if you can send the part of your code that includes the matlab stuff that would help.
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Error 1050 by trying to use load'filename' in matlab script node

Hi
I keep getting error 1050 when Labview tries to load a text file through the matlab script node.
I've all ready checked for it on google and this forum but found nothing. I've also done this: http://digital.ni.com/public.nsf/allkb/2B3FF46C8512C4F786256CF30071BE53 and tried to use dlmread and more.
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Solved!
Go to Solution.
Attachments:
matlab.jpg ‏213 KB

Yes I forgot, this is my error... It looks like it can't read the file path, but the 'file' path is actually just a path to my c:\user\*\*\*\*.txt
Error 1050 occurred at LabVIEW: Error occurred while executing script. Error message from server: ??? Error using ==> load
Unable to read file file: No such file or directory.

MATLAB script in executable

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