error code 6, mountainsortalg.ms3alg -- Unexpected error putting together the clips in NeighborhoodSorter::sort()

[czawora]

I am running mountainsortalg.ms3alg on a 40GB file containing 96 channels and 107920368 timepoints sampled at 30kHz. I am running on linux with 100GB of RAM and 60 CPUs. The full command is:

RUNNING mountainsortalg.ms3alg: /spin1/home/linux/zaworaca/mountainlab/packages/mountainsort/packages/mountainsortalg/bin/mountainsortalg.mp mountainsortalg.ms3alg --geom=/data/zaworaca/data/NIH037_test/NIH037_160123_2355_utah_m/geom.csv --timeseries=/data/zaworaca/data/NIH037_test/NIH037_160123_2355_utah_m/NIH037_160123-2355_160124-0054_1-96.mda_bp_reref --firings_out=/data/zaworaca/data/NIH037_test/NIH037_160123_2355_utah_m/firings.mda 
--adjacency_radius=0 --clip_size=50 --consolidate_clusters=true 
--consolidation_factor=0.9 --detect_interval=10 --detect_sign=-1 
--detect_threshold=3 --fit_stage=false --merge_across_channels=false --t1=0 --t2=-1 
--_tempdir=/data/zaworaca/mountain_temp/mountainlab/tmp_short_term/tempdir_HTEQ4CZYMX

I get the following error:

Unexpected error putting together the clips in NeighborhoodSorter::sort(). 786924 795975
Warning: Unable to open mda file for reading: /data/zaworaca/mountain_temp/mountainlab/tmp_short_term/tempdir_HTEQ4CZYMX/.tmp.diskbackedmda.2VTCH72QKI.mda

2018-06-20:17-07-04-285 mproc.main      warning
2018-06-20:17-07-04-305 mproc.main      warning Process returned with non-zero exit code (6): mountainsortalg.ms3alg (Elapsed: 797.611 sec)

any clues as to what the error is caused by? I am attaching the full output.

_sort_error.log