Undefined function 'caffe_' for input arguments of type 'char'. Matlab

[Socierducode]

I met such an Matlab error for the classification demo
Undefined function 'caffe_' for input arguments of type 'char'.

Error in is_valid_handle (line 12)
init_key = caffe_('get_init_key');

Error in caffe.Net (line 36)
CHECK(is_valid_handle(hNet_net), 'invalid Net handle');

Error in caffe.get_net (line 28)
net = caffe.Net(hNet);

Error in caffe.Net (line 31)
self = caffe.get_net(varargin{:});

Error in classification_demo (line 88)
net = caffe.Net(net_model, net_weights, phase);

Thank you in advace for your response

[Belinda-great]

i have the same problem，MATLAB error: This error was detected while a MEX-file was running. If the MEX-file is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files. Can you tell me if you solve it ?

[Socierducode]

@Belinda-great Sorry not yet, caffe_ works for choosing the gpu core, but not the 'get_init_key', that's weird.

[stoneyang]

Same problem....

[fslzj]

The file "caffe_.mexw64" and "caffe_.lib" is in "..\Build\x64\Release\matcaffe+caffe\private". So you should copy the fold "..\Build\x64\Release\matcaffe+caffe\private" to "..\matlab+caffe\private", or change the path "..\matlab+caffe\private" into "..\Build\x64\Release\matcaffe+caffe" in demo.

[stoneyang]

Maybe one could see BVLC#4461 for reference.