I am getting an error of “Undefined function 'Calllib' for input arguments of type 'char'.”

Hi,

Help me with this.

I am writing a matlab script to read a LabVIEW dll.

Following is the script

clear all

loadlibrary('AETSmapinput','AETSmapinput.h','alias','lib');

libfunctionsview lib;

vp = '';

len = 3;

y = [];

z = [];

[x1,x2,x3] = Calllib('lib','CheckIOFromAETSToMatlab',vp,double(y),double(z),len);

unloadlibrary(lib);

clear all

I am getting an error of “Undefined function 'Calllib' for input arguments of type 'char'.”

When I am listing the dll the following is the datatypes listed in the dll function

list =

    '[cstring, doublePtr, doublePtr] CheckIOFromAETSToMatlab(cstring, doublePtr, doublePtr, int32)'
    '[long, cstring, voidPtr] LVDLLStatus(cstring, int32, voidPtr)'

What could be the reason for this?

Thanks

Anna

Answer 1

[ES]

Calllib is not available in the MATLAB path. do a which -all Calllib to check if it is defined anywhere. I guess not.

If it is a user defined function or plugin, find the source and add it in your MATLAB path and then run the script.

Answer 2

[Geoff Hayes]

While Anna probably figured this out months ago, the function to call a method in a shared library is called calllib with a lowercase 'c' and not Calllib with an uppercase 'C'. So the above code becomes

 [x1,x2,x3] = calllib('lib','CheckIOFromAETSToMatlab',vp,double(y),double(z),len)