command line nextflow run nf-core/chipseq -r 2.0.0 --input samplessheet.csv --fasta funga.fna --outdir results --gff funga.gff --macs_gsize 6538260 --aligner bwa -profile singularity Command error: Matplotlib created a temporary config/cache directory at /tmp/matplotlib-9g4awc24 because the default path (/home/tom/.config/matplotlib) is not a writable directory; it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing. Traceback (most recent call last): File “/usr/local/bin/computeMatrix”, line 14, in <module> main(args) File “/usr/local/lib/python3.8/site-packages/deeptools/computeMatrix.py”, line 421, in main hm.computeMatrix(scores_file_list, args.regionsFileName, parameters, blackListFileName=args.blackListFileName, verbose=args.verbose, allArgs=args) File “/usr/local/lib/python3.8/site-packages/deeptools/heatmapper.py”, line 271, in computeMatrix matrix = np.concatenate([r[0] for r in res], axis=0) File “<__array_function__ internals>“, line 5, in concatenate ValueError: need at least one array to concatenate the full nextflow.log is attached. Thanks

Hi, I’d say that the issue with matplotlib is just a warning the error is through because of this:

ValueError: need at least one array to concatenate

Probably due to a similar reason to this one