STACK Error

STACK Error

by Marco Cigna -
Number of replies: 6

Hi everyone,

When using the STACK plugin, the plugin breaks giving the following error

"Exception - property_exists(): Argument #1 ($object_or_class) must be of type object|string, null given"

I believe this to be a database issue but I am unable to track down the source of it. I've setup a fresh moodle instance and tested this, and it worked fine with a clean database. However, when testing on the dev site it causes this issue.

To recreate this I added another question in the following line:





Stack Trace:


Any help is greatly appreciated, spent a long time trying to debug this.

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In reply to Marco Cigna

Re: STACK Error

by Christopher Sangwin -
Picture of Particularly helpful Moodlers Picture of Plugin developers
Ok, I know the problem: you've called a PRT the same name as the input. This should not matter, and the question you emailed me works fine on the latest release (I was confident we'd fixed this), but I think that's the underlying issue.

Chris
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In reply to Christopher Sangwin

Re: STACK Error

by Marco Cigna -
Hi Chris,

Could you please elaborate what this means? "you've called a PRT the same name as the input"

Is there something that can be done on our end to fix this?

Thanks!
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In reply to Marco Cigna

Re: STACK Error

by Michael Roberts -
Hi Marco and Chris,

I've encountered this error message also. It occurs when you are adding any new PRT to an existing STACK question, and it's occurring in Moodle 4.0.
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In reply to Michael Roberts

Re: STACK Error

by Christopher Sangwin -
Picture of Particularly helpful Moodlers Picture of Plugin developers
This error was resolved with STACK 4.4.4.
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In reply to Christopher Sangwin

Re: STACK Error

by Marco Cigna -
Hi Chris,

Great news to hear! I've updated to 4.4.4 and it seems to working good so far. Out of curiosity what was the issue with it?
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