Writing a live script that contains return-statements. Exported PDF empty and cannot be opened.

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Santtu Söderholm 2018-6-6

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编辑： Santtu Söderholm 2018-6-11

I've been trying to Write a Live script for electronic exam purposes (teaching the use of MATLAB), that contains return-statements that prevent the script from progressing further if intermediate variable assignments are incorrect. The input inspectons are currently done using multiple p-files that return true or false depending on the value of the variables entered by the student (whether a variable is an integer or a specific vector, for example).

I'm wondering whether the use of return-statements is preventing the Live script from being exported to PDF, since whenever I attempt it the resulting PDF is empty and cannot be opened. I'm guessing MATLAB attempts to run the file during the export process and fails to do that because of the return-statements.

If this is how the system is implemented, I'm going to have to rethink how I do this.

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Santtu Söderholm 2018-6-6

I tried removing all of the return-statements and the file runs just fine without any errors, but I still get an empty PDF-file when trying to export. I'm now thinking the problem might be elsewhere...

Santtu Söderholm 2018-6-6

Tried to export the same file on a Windows machine and it worked flawlessly. There is clearly a problem with either my MATLAB-installation (MAC) or something else just isn't working on my computer.

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Answer 1

Prajit T R 2018-6-11

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Hi Santtu

This issue was reported earlier for MAC devices and there are workarounds to get around this:

1. Try increasing the Java heap size and see if you are able to successfully able to export to PDF then. Instructions for doing so are on this page: https://www.mathworks.com/help/matlab/matlab_external/java-heap-memory-preferences.html

2. Try converting to PDF from the command line using the following command (make sure you are in the same folder that your live script is saved in, and replace 'myscript.mlx' and 'mypdf.pdf' with the names of your files):

>> matlab.internal.liveeditor.openAndConvert('myscript.mlx','mypdf.pdf')

Hope this helps.

Prajit