Error 1048 occurred at LabVIEW: LabVIEW failed to get variable from the script server. Server:"??? Undefined function or variable 'volt_out'.

[baseball07]

Hi everyone.  I am running a MatLab (2007) script node in my VI (LabVIEW 8.2) and I am getting an error whenever I run the VI.  The error is:

Error 1048 occurred at LabVIEW:  LabVIEW failed to get variable from the script server. Server:"??? Undefined function or variable 'volt_out'.

volt_out is defined in my code so I don't understand why I keep getting the error.  I attached my MatLab script.  Any thoughts on this would be appreciated.  Thanks for the help.

[muks]

Why Does My Script Written in The MathWorks, Inc. MATLAB® Language Syntax Return Error 1048?

[baseball07]

Thank you for your response.  I actually already looked at the link you sent me and their explanation of the cause of the error is not my problem. 

1.  The variable name volt_out is not the same as a function name in MatLab

2.  I am not using the clear all function in my script.

3.  I am not utilizing a function such as "input"  that requires interaction with the command window.

Any thoughts as to what is going on? 

Thank you for the help.

[Smootastic]

Hi baseball07,

Are you able to run the script directly in MATLAB? 

[baseball07]

The MatLab code seems to be ok.  I think it is a problem with interfacing with LabVIEW.  I still cannot figure out what it could be.  Are there any more suggestions?  Thank you.

[Peñata]

Hi baseball07,

To go back to Kyle's question, are you able to run this same script in MATLAB? Have you tried dropping down a new MATLAB Script Node and copy/pasting your script into that one? Have you tried starting from a blank script and incrementally building and testing your script?

Aaron P

National Instruments

Applications Engineer

http://www.ni.com/support

[mattis]

I have the exact same problem. The script is working in Matlab. Any thoughts?

[StephanieA]

To go back to what Aaron was saying, did you import or copy/paste the script into the node? How about taking portions of the code and slowly building your script in the MathScript node.

[mattis]

Hi Stephanie,

Thanks for the reply. It works now. At the beginning of my function i used a relative path and the current directory was not set properly. The reason that i got confused was that I got an error message saying "Undefined function or variable". The reason for this was that I had an "return" statement inside an if such that the function was quited before my variable was set. It is always more than one error 🙂

Another thing that confused me was that you have to re-open the vi after you make changes in the Matlab script. I guess Labview make a copy of the m-file when opening ?

Best regards

Marius

[Kongying]

Hi. I got the same problem. what does it mean, you said “The reason for this was that I had an "return" statement inside an if such that the function was quited before my variable was set”？