Crash when using caffe inside a Matlab mex file

[xn8812]

I want to extract features of images by Matlab. To save the features to a file, I wrote a mex file in which a matlab function 'feat()' is called. The matlab function 'feat()' can be any feature extractor such as Histogram of Gradient, or Caffe.

Here is the problem: when I use caffe command (such as caffe('is_initialized') and etc.) inside the matlab function 'feat()', my matlab freezes and there are two error messages shown in the terminal:

libprotobuf ERROR google/protobuf/descriptor_database.cc:57] File already exists in database: caffe/proto/caffe.proto
[libprotobuf FATAL google/protobuf/descriptor.cc:954] CHECK failed: generated_database_->Add(encoded_file_descriptor, size):

I am sure my mex file is ok with other kinds of feature extractors and my matcaffe runs normal in other .m files. So does anyone know what the problem is and how I can solve it? Please help! Thank you!

[xn8812]

any help is appreciated! Thanks!

[shelhamer]

This is likely a duplicate of the protobuf linking issues discussed in #1917.