Hi Astor Bizard and Alexandre Meslé,
Thanks for the help. I worked last week with the administration, but I am not an administator. We try several configurations in the global configuration, some stop the pre-check from working, and no configuration could make the grade working.
We conclude that should be something in the execution server, since we change the local execution server to
http://demojail.dis.ulpgc.es, it works, if we set to our server
https://vpl-jail.uab.pt (or
http://vpl-jail.uab.pt) do not work the VPL question, but work the VPL activity.
I made now a test, after submiting a VPL question that return no grade, go to the VPL activity and submit the data that was there (from the VPL question), and return the following:
Testing 1/1 : 1
<|--
-Summary of tests
>+------------------------------+
>| 1 test run/ 1 test passed |
>+------------------------------+
--|>
Grade :=>> 1
So, it appear that only our execution server and VPL question are not working 100%.
I will confirm with the administration, but I think we have the latest version, since the platform have the upgrade last month.
I checked the grade in VPL activity and it have a grade, that is visible to the students (but the course is now closed, I am preparing the next semester).
I already setup a quiz without time limit, so the students can return and continue, during each module. Thanks to the VPL question type, I could put all content in a single quiz, so I can also make a block with results of top 100 of student progress, based on that quiz. I will keep the previous tool as a backup, but I think this will be a clear better tool/method, since the students are reading and have a zone to write / complete the code and check the result, and I can see what the students are doing. If the problem is not solved until the semester start, I can always setup the quiz without grades, but with that I would lost the top 100, that I think works well in student motivation.
Regards,
José