R2022a problem: Line number missing in error message sent to Command Window.

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Scott MacKenzie 2022-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/1700205-r2022a-problem-line-number-missing-in-error-message-sent-to-command-window

评论： Jeremy P 2024-2-15

采纳的回答： Siddharth Bhutiya

With R2022a, line numbers are sometimes omitted in error messages. Here's an example using a trivial script:

If I run the same script in R2021b, here's the result:

Weird. What's going on?

Is there a way to fix this in R2022a?

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Scott MacKenzie 2022-4-22

Yes, I think the problem is limited to tables. But, it goes beyond just referencing an unrecognized table variable. In the example below, the table variable exists. The error (reported without a line number) is in how the contents are accessed:

David Szwer 2022-5-17

I get this problem too; also regarding tables, but a different error.

>> ProcessAll

Error using ProcessMovement

All tables being vertically concatenated must have the same number of variables.

Error in ProcessAll (line 10)

[moving, moveN] = ProcessMovement(filedir, 0);

Note that ProcessAll and ProcessMovement are both functions. Back in the day, Matlab wouldn't show line numbers at all if the error was in a script; this isn't a reversion to that behaviour, it is something different.

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Siddharth Bhutiya 2022-5-18

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https://ww2.mathworks.cn/matlabcentral/answers/1700205-r2022a-problem-line-number-missing-in-error-message-sent-to-command-window#answer_966635

编辑：Adam Danz 2023-10-16

Update: this bug was fixed in R2022a update 3 and in R2022b.

------------

This is a bug, thank you for reporting it! I have passed it along and it will be fixed in a future release.

Here is the bug report for this: https://www.mathworks.com/support/bugreports/2608278

As mentioned in the bug report, while this is being fixed, you could use MException.last.stack(1) to see the line number.

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EFB 2023-10-15

Unfortunately I experience a similar problem also in R2023b. I often use pre-defined error messsages as a tool for debugging, and for these the line numbers are not shown.

I.e.

if(ii == 4 && k == 200)

error('I want to make an error here')

end

produces the error message, but I dont get to see where in the code it is.