I'm trying to bin 1x normalized ATAC-seq bigWig (generated by the bamCoverage function) with the multiBigwigSummary function in deepTools with the intention of clustering several ATAC-seq samples with deepTool's plotCorrelation function. My bamCoverage commands look like this:

bamCoverage -b input.bam -o output.SeqDepthNorm.bw -p "max" --effectiveGenomeSize 2805636331 --normalizeUsing RPGC -ignore chrX chrY chrM -e

This successfully generates the bigwig output files without any indication of a problem. However, when I then feed these bigwig files into multiBigwigSummary with the following command:

multiBigwigSummary bins --bwfiles first.SeqDepthNorm.bw \
  second.SeqDepthNorm.bw \
  third.SeqDepthNorm.bw \
  fourth.SeqDepthNorm.bw \
  fifth.SeqDepthNorm.bw \
  sixth.SeqDepthNorm.bw \
  seventh.SeqDepthNorm.bw \
  --outFileName normalized_ATAC_peaks_bins.npz --binSize=1000 -p "max" -v \
  --labels first second third fourth fifth sixth seventh

it throws the following error almost right away:

multiprocessing.pool.RemoteTraceback: 
""" 
Traceback (most recent call last): 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/multiprocessing/pool.py", line 119, in worker 
    result = (True, func(*args, **kwds)) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/multiprocessing/pool.py", line 44, in mapstar 
    return list(map(*args)) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/site-packages/deeptools/getScorePerBigWigBin.py", line 18, in countReadsInRegions_wrapper 
    return countFragmentsInRegions_worker(*args) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/site-packages/deeptools/getScorePerBigWigBin.py", line 107, in countFragmentsInRegions_worker 
    score = bwh.stats(chrom, exon[0], exon[1]) 
RuntimeError: Invalid interval bounds! 
""" 
The above exception was the direct cause of the following exception: 
Traceback (most recent call last): 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/bin/multiBigwigSummary", line 14, in <module> 
    main(args) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/site-packages/deeptools/multiBigwigSummary.py", line 262, in main 
    allArgs=args) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/site-packages/deeptools/getScorePerBigWigBin.py", line 268, in getScorePerBin 
    transcript_id_designator=transcript_id_designator) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/site-packages/deeptools/mapReduce.py", line 142, in mapReduce 
    res = pool.map_async(func, TASKS).get(9999999) 
  File "/DCEG/Resources/Tools/python3/3.6.3-shared/lib/python3.6/multiprocessing/pool.py", line 644, in get 
    raise self._value 
RuntimeError: Invalid interval bounds!

What's causing this problem? Is there a workaround? Any help ironing this out would be greatly appreciated!