MatFileReader mfr = new MatFileReader('myFileName.mat') Ĭsmatio.io.MatlabIOException : Error in reading MAT-file 'myFileName.mat':Ĭsmatio.io.MatlabIOException: Could not decompress data: .ZStreamException: inflating:Īt .ZInputStream.Finish(Byte buffer, Int32 offset, Int32 count)Īt .ZInputStream.Read(Byte buffer, Int32 offset, Int32 count)Īt (Stream input, Stream output, Int32 bufsize)Īt csmatio.io.MatFileReader.Inflate(Stream buf, Int32 numOfBytes)Īt csmatio.io.MatFileReader.ReadData(Stream buf)Īt csmatio.io.MatFileReader. Starts with MATLAB 5.0 MAT-file, Platform: PCWIN, Created on: Thu May 29 12:17:17 2014 I'm not really set up to test java functions.but the other questions I can answer.įiles open without problem in matlab itself It would be nice if you could update the topic here if you go on. The library ist maintained by ComponentAce ( ) Maybe you can try to contact their support and ask for help. A MAT-file stores data in binary (not human-readable) form. The zlib dll comes with source code that is very hard to debug if you look at it the first time. MATLAB, but when writing a MAT-file under these circumstances, you need to specify a switch in the save or matOpen command line to tell MATLAB that theMAT-fileisatLevel4. The new mat file was read by csmatio without problems. To hunt down the problem I replaced all the values in 'V' with some random values and saved it to new mat file. The 'V' array has a very high compression rate (it seems that 2304056 data bytes are compressed into 17728) because there are many equal values in it. But as I looked at the problem with the debugger it felt that it could be the other way round: mat file format is misinterpreted by csmatioīecause zlib is much more in use than csmatio one would normally think that the problem should be located in csmatio.In my case, mat files under 2 GB didn't have any problem loading from my MATLAB (2017b) whether docompression is True or False, but when I load 2.25 GB mat file saved using scipy.io.savemat() with compression, MATLAB failed to load even though I can load it from Python. So basically I see two possibilities her: For large files, MATLAB cannot load when saved with docompressionTrue. For the 'T' array this works fine, but it fails for the 'V' array.

It contains two compressed double arrays 'T' and 'V'. The mat file itself does not look suspicious.

Matlab mat file compression