Error message whenever stepwise is run

Adam Danz 2020-9-14

We need to see the line that generate this error (the line that calls stepwise) and the inputs.

Mark Walton 2020-9-14

Thanks for the reply. Actually I gave all of that information. The line that calls stepwise is:

stepwise(dog, cat)

The inputs are the two test variables, dog and cat. I should say, though, that I get this error with every input variables I have tried.

Adam Danz 2020-9-14

The error message contains stepwise(dot,cat) but that doesn't necessarily mean that's the line you called that caused the error.

Based on these answers below, you may be missing an fclose(fid).

Mark Walton 2020-9-14

在 MATLAB Online 中打开

Thanks for following up, Adam. I think I am not doing a good job of explaining what I am doing. If I start with no variables in the workspace, create the "dog" and "cat" variables, and then run stepwise(dog, cat) then I get the error. In other words, the following code generates the error every time:

clear
dog = [1:5; 2:6; 6:10];
cat = 101:105;
dog = dog'
cat = cat'
stepwise(dog, cat)

There are no other lines of code.

Jon 2020-9-14

When I run the commands you list above it opens the user interface and does not give any errors. I am running ver 2020A. So it does not seem to be a general bug, but something specific to your setup or situation.

Mark Walton 2020-9-14

Thanks, Jon. I agree -- I doubt that this is a general bug.

It must be some setting of mine that is causing trouble. I'm just not sure how to figure out what it is. :-)

Adam Danz 2020-9-14

Did you look into those links I provided?

Other users got similar error message when too many files were open using fopen.

If that's the problem, "fclose all" should fix it.

Mark Walton 2020-9-14

编辑：Mark Walton 2020-9-14

Thanks Adam,

Running "fclose all" didn't solve it. Interestingly, the following command generates no error:

stepwisefit(dog, cat)

That leads me to wonder if, perhaps, the problem is some graphics setting that got changed, That is, "stepwise" generates an error because it produces a GUI interface, but "stepwisefit" works fine, because it doesn't.

Maybe?

In case this helps, running "info = rendererinfo(gca)" yields:

GraphicsRenderer: 'OpenGL Hardware'

Vendor: 'NVIDIA Corporation'

Version: '4.6.0 NVIDIA 388.16'

RendererDevice: 'NVS 315/PCIe/SSE2'

Details: [1×1 struct]

Adam Danz 2020-9-14

Does the problem persist after restarting Matlab?

Have you tried setting opengl software?

Mark Walton 2020-9-14

The problem persists after restarting Matlab. I haven't tried setting opengl software. I am not completely sure how to do that. (Sorry.)

Adam Danz 2020-9-14

Type opengl info and copy that info into a text file so you know what you started with.

Then type opengl software to change from hardware to software.

Likewise for other versions

opengl software

opengl hardware

opengl hardwarebasic

Walter Roberson 2020-9-14

在 MATLAB Online 中打开

Try

restoredefaultpath
rehash toolboxcache

and then run your code with stepwise(). If it works, then you probably have a conflicting function from a third-party toolbox on your regular MATLAB path.

Mark Walton 2020-9-15

Thanks Adam and Walter,

Unfortunately, neither of those worked. After running "opengl software" I still can't run stepwise and now I get an error message when I run "opengl info", "opengl hardware", or "opengl hardwarebasic".

The error message is:

Message Catalog MATLAB:class was not loaded from the file. Please check file location, format or contents

Even running "opengl info" yields that error message now. "Stepwise fit" still works.

Adam Danz 2020-9-15

编辑：Adam Danz 2020-9-15

在 MATLAB Online 中打开

This suggestion might be helpful

https://www.mathworks.com/matlabcentral/answers/127897-unexpected-error-message-showing-std-exception#answer_135346

The file described in that answer was found in the directory below on my system (r2019b)

C:\Program Files\MATLAB\R2019b\resources\MATLAB\en

If that file is where it should be, then perhaps you should contact tech support.

https://www.mathworks.com/support/contact_us.html

Walter Roberson 2020-9-15

Once you get the error message about message catalog you probably have to quit MATLAB and restart it.

Error message whenever stepwise is run

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