How do I recover data from a corrupt MAT-file?

The issue might be caused by the presence of a corrupt zero-byte tag in the MAT-file. If this is the case, one might be able to extract the data from the MAT-file until a corrupt zero-byte tag is reached.

Please download the following SPLITMAT file in your current folder of MATLAB. Also, please ensure that the corruptMATFile is in the same current folder.

Then use the command as detailed below:

splitmat corruptMATFileName % Do not include the .mat extension

The above command will generate "n" MAT-files: corruptMATFileName_1.mat through corruptMATFileName_n.mat, each containing a variable contained in the original MAT-file.

If this command does not work, you may also try the following syntax to recover non-corrupted variables from the MAT-file:

>> load('<corrupted_file>.mat', '<uncorrupted_variable>');

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Walter Roberson 2016-7-2

The tools you are using to work with potentially corrupt files are intended for -v5 and -v7 MATLAB files, and not for -v7.3 files. -v7.3 files are a customized HDF5 format; sometimes they can be examined with HDF5 tools.

Walter Roberson 2018-7-6

If you attach the .fig and associated .m files, I can try running it through some tools I have been developing. No promises, though, as the tools are not designed for the case where the .fig is a corrupted .mat .

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