tabix.TabixError: Can't open the index file.

[Yousuk-Song]

Hi, I tried to run hint cnv and got these error messages.

open: No such file or directory
Traceback (most recent call last):
File "/data2/home/song7602/Tools/HiNT/bin/hint", line 202, in
main()
File "/data2/home/song7602/Tools/HiNT/bin/hint", line 194, in main
cnvrun(argparser)
File "/data2/home/song7602/Tools/HiNT/HiNT/runhint.py", line 86, in cnvrun
chroms,regressionFileAllchroms,regressionChromFilesInfo = prepareData(opts.name,opts.outdir,opts.referencedir,chromlf,rowSumFilesInfo,binsize,GCPercent_1kb,mappablity_track,restrictionSites) #Prepare the other data Information for regression
File "/data2/home/song7602/Tools/HiNT/HiNT/prepare_regression.py", line 167, in prepareData
mapscore = getmappability(mappablity_track, chrom, 1, chromLength, resolution)
File "/data2/home/song7602/Tools/HiNT/HiNT/prepare_regression.py", line 42, in getmappability
tb = tabix.open(mappablity_track)
tabix.TabixError: Can't open the index file.

is mappability_track file required as an input for running hint cnv? and if it is, which path should it be located in? at reference genome directory?