Mathematics tools

Hi all

Before the summer holidays, we upgraded our moodle to 3.9 and we also updated to Ubuntu 20.04, with the most recent packages as of July 17 2020.

I noticed several students getting problems of STACK questions not working for their summer homework. Today, on running the healthcheck scripts, I got some errors. I updated plugin to the latest STACK version, and still the same errors. Any pointers would be appreciated:

1. In STACK plugin settings, the highest Maxima version I can set is 5.42.2 but I have Maxima 5.43.2

Health check script output:

Unpacked result as

Array
(
    [0] => Array
        (
            [key] => CASresult
            [value] => n*x^(n-1)
            [dispvalue] => n*x^(n-1)
            [display] => stack_disp(n*x^(n-1),"")
            [error] => 
        )

    [1] => Array
        (
            [key] => STACKversion
            [value] => stackmaximaversion
            [dispvalue] => stackmaximaversion
            [display] => stack_disp(stackmaximaversion,"")
            [error] => 
        )

    [2] => Array
        (
            [key] => MAXIMAversion
            [value] => "5.43.2"
            [dispvalue] => "5.43.2"
            [display] => stack_disp("5.43.2","")
            [error] => 
        )

    [3] => Array
        (
            [key] => MAXIMAversionnum
            [value] => 43.2
            [dispvalue] => 43.2
            [display] => stack_disp(43.2,"")
            [error] => 
        )

    [4] => Array
        (
            [error] => There is no settable external format.
            [key] => externalformat
            [value] => false
            [dispvalue] => false
            [display] => stack_disp(false,"")
        )

    [5] => Array
        (
            [key] => CAStime
            [value] => "2020-09-01 13:07:53"
            [dispvalue] => Unrecoverable error: Segmentation violation..timeout: the monitored command dumped coreAborted
            [error] => 
        )

)