dbup does not behave as expected

5 次查看（过去 30 天）
敬 杨
敬 杨 2025-5-29
评论： 敬 杨 2025-5-30
In MATLAB '25.1.0.2943329 (R2025a)', when in debug mode, calling dbup within a function behaves differently from calling dbup directly.
Save the following code as test_bug1:
function test_bug1(a,b)
c = a + b;
end
First, run
dbstop if error,
then call
test_bug1([1 2 3], [2 3]);
This will enter debug mode at the line c = a + b inside the test_bug1 function.
Executing dbup at this point behaves as expected and returns to the previous workspace.
However, if you define the following function:
function dbup_1()
dbup;
end
Executing dbup_1 at that moment results in an error, indicating that the current command is not a debugging command.
Similarly, if you create the following script and save it as dbup_2:
dbup;
Calling dbup_2 still results in the same error.
My question is: What causes the issue above?
If I want to include dbup, dbdown, and similar commands inside a function, how should I proceed?
  2 个评论
Adam Danz
Adam Danz 2025-5-29
Accessing variables from a different workspace usually it not a good idea. What's the ultimate goal? Why can't it be realized by passing variables into the function?
敬 杨
敬 杨 2025-5-30
You can refer to another question I asked for more details.
how to save the debugging state at matlab? - MATLAB Answers - MATLAB Central
Simply put, I would like to save the variables from every level of the function call stack when an error occurs in the program.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Matt J
Matt J 2025-5-29
编辑：Matt J 2025-5-29
There are special limitations on dbup, dbdown, and friends. You cannot call them from functions, because when a function is executing, you are not in debug mode anymore.
  3 个评论
显示 1更早的评论
Adam Danz
Adam Danz 2025-5-29
This is documented in the dbup page, "dbup can only be called from the command line."
Matt J
Matt J 2025-5-29
编辑：Matt J 2025-5-29
Specifically, though, from the debugger command line:
>> dbup
Error using dbup
Debug commands only allowed when stopped in debug mode.
>> keyboard
K>> dbup
In base workspace.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Debugging and Analysis 的更多信息

标签

产品


版本

R2025a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by