calllib issue... library not found...

For some reason I have an error that says "Error using calllib Library was not found" yet I know it is in the MATLAB generals file, I even added the path manually to ensure my files are going there and it still can not find it. I was hoping to have some help if someone knows what the issue is, they would let me know what is up. Thanks!

[Image Analyst]

Hard to say without seeing any code, don't you think? What if you specify the full file name with fullfile() before you call loadlibrary()?

[Chris E.]

Hello, I'm sorry if it did not make since or something, I had two responses that said essentially, need more info, but it was the matlab example, found here:

http://www.mathworks.com/help/matlab/ref/calllib.html#btgwu6s

if ~libisloaded('shrlibsample')
   addpath(fullfile(matlabroot,'extern','examples','shrlib'))
   loadlibrary('shrlibsample')
end

libfunctionsview shrlibsample

struct.p1 = 4; struct.p2 = 7.3; struct.p3 = -290; 

[res,st] = calllib('shrlibsample','addStructByRef',struct);

res

For whatever reason I can not seem to use calllib. Still says the library is not found. I don't know why... That is why I was seeing if it was something someone else ran into.

[Walter Roberson]

You might have to compile the example first.

If you

cd(fullfile(matlabroot,'extern','examples','shrlib'))

then what does

ls

report as being present? And are you using 32 bit MATLAB or 64 bit MATLAB? With which operating system?

[Chris E.]

Thanks I think that did it (somehow)... I'm using 64 but now it is not running into the same issue. thanks

[Chris Bresee]

Just for future people who may have a similar problem: Try adding the directory to your Windows environment system variables, either directly or in matlab, with: setenv('LibraryName', 'c:\Your\Install\Path\Library')

Answer 1

[Walter Roberson]

You are generating 32 bit libraries and trying to use them on a 64 bit MATLAB. Or the moon is still in the 6th house and Jupiter has not quite aligned with Mars. Take your pick; one is as good as another with the information you gave us.

[Chris E.]

Thanks for letting me know, but the code was the example of MATLAB's calllib. it just is not working. I was seeing if someone else ran into this problem. Sorry if it was not enough info, but it was the simple example that MATLAB website gave. However Jupiter was not quite lined up with mars, so it could of been that.....

Answer 2

[Image Analyst]

Worked for me. Can you go here C:\Program Files\MATLAB\R2013a\extern\examples\shrlib and tell us what files you see? Change the version number if you need to, and change Program Files to Program Files (x86) if you have a 64 bit system but are running 32 bit MATLAB. You should see shrlibsample.mexw64, shrlibsample.c, and shrlibsample.h.

Answer 3

[Chris Bresee]

I had a similar problem. I was adding .dll and .lib files to my matlab path, but had forgotten to add them to my Windows path. Try: setenv('CEDS64ML', 'c:\Your\Install\Path\CEDS64ML');