Why do I get Library was not found Error while using external library in parpool?
显示 更早的评论
Hi,
I would like to call external library functions in parallel.
I am using the code below.
clear all
if ~libisloaded('shrlibsample')
addpath(fullfile(matlabroot,'extern','examples','shrlib'))
loadlibrary('shrlibsample')
end
struct.p1 = 4; struct.p2 = 7.3; struct.p3 = -290;
parpool('AttachedFiles',{'shrlibsample.mexw64','shrlibsample.h','shrlibsample.c', 'shrhelp.h'});
parfor i=1:4
[res,st] = calllib('shrlibsample','addStructByRef',struct);
end
unloadlibrary shrlibsample
But, when running this code, I am getting error- ERROR: Library was not found
How to fix this?
采纳的回答
MathWorks Support Team
2018-4-23
编辑：Edric Ellis
2018-4-24
This error means that the library you are trying to call is not available in parallel workers.
Although, you have added required files to the parallel pool using 'AttachedFiles', the reason why this error is thrown is that those libraries are not loaded in parallel workers.
In order to have libraries available in those workers, please load libraries in each worker.
clear all;
addpath(fullfile(matlabroot,'extern','examples','shrlib'))
struct.p1 = 4; struct.p2 = 7.3; struct.p3 = -290;
parpool('AttachedFiles',{'shrlibsample.mexw64','shrlibsample.h','shrlibsample.c', 'shrhelp.h'});
parfor i=1:4
if ~libisloaded('shrlibsample')
loadlibrary('shrlibsample')
end
[res,st] = calllib('shrlibsample','addStructByRef',struct);
end
unloadlibrary shrlibsample
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Call C from MATLAB 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
