File too large for xdf load

[MaJoRkranz]

Hi,
I simultaneously recorded EEG and audio using the LabRecorder and synchronized the streams in LSL. When loading the audio streams using pop_loadxdf (version: 1.18) I receive the following message: 'Warning: Rank deficient, rank = 1, tol = 4.574081e+03'. The error is caused in line 600 in load_xdf when the jitter is removed:
'mapping = temp(k).time_stamps(indices) / [ones(1,length(indices)); indices];'
As a result, trigger markers, which I use to epoch the EEG and audio streams, are not correct in the audio stream.
The error occurs only if an audiostream has a length of approximately more than 62.000.000 data points. I recorded with a sampling rate of 44100, thus I have roughly 23 min of data.

Here an example how to reproduce the error in MATLAB 2020b:

% this throws an error in matlab 2020b
% Warning: Rank deficient, rank = 1, tol = 4.366797e+03.
nrSamples =65000000;
time_stamps=linspace(0,26,nrSamples);
indices=1:length(time_stamps);
mapping = time_stamps(indices) / [ones(1,length(indices)); indices];

%this does not, only differenc is nrSamples
nrSamples =60000000;
time_stamps=linspace(0,26,nrSamples);
indices=1:length(time_stamps);
mapping = time_stamps(indices) / [ones(1,length(indices)); indices];

I appreciate any help!

As this is rather an xdf_load issue I posted it already here: xdf-modules/xdf-Matlab#12 (comment)
So far no one answered, so I wanted to give it a try here :)

[David Medine]

Since this is indeed not an issue with LabRecorder I am going to close this and move the discussion to the xdf-Matlab issue.