SWITCH expression must be a scalar or string constant.

I have tried to install Math Convnet toolbox. I am follwing the instructions in http://www.vlfeat.org/matconvnet/quick/. when i use the comment " run matlab/vl_compilenn", (third comment) i am getting the following error.

SWITCH expression must be a scalar or string constant.

Error in vl_compilenn (line 181) switch opts.imageLibrary

Error in run (line 64) evalin('caller', [script ';']);

Kindly help me. Thanks in advance.

[Tyler Clark]

I am having the exact same problem...

[Walter Roberson]

Are you trying to run the code in 32 bit MATLAB or 64 bit? It is only designed for 32 bit MATLAB

[Tyler Clark]

I am running it on 32 bit MATLAB

[Image Analyst]

What does this show:

whos opts.imageLibrary

does it show a single element, a scalar? Like a number or character and not an array? It can't be an array.

[Tyler Clark]

nothing comes up. Im using MATLAB 2013a could that make a difference?

[Image Analyst]

I don't know. Your best approach is to contact the author of that toolbox.

Answer 1

[Walter Roberson]

That code is only for 64 bit architectures; I suspect you are trying to run it with 32 bit MATLAB.

[Mona]

so how to run that on 32-bit ?

[Walter Roberson]

You would need R2015b or earlier to run the 32 bit version.

However, it appear to me that the current versions of matconvnet should be suitable for 64 bit versions.