error in conversion from mbtiles to pngs

[toqeer786]

i want to convert mbtile file into png when i run this command : sudo python3 mbtiles2files.py -f /data/cyprus1.mbtiles -o /media/python-mbtiles-master/tmp/output --invert but it give me an error : Traceback (most recent call last): File "mbtiles2files.py", line 24, in tileset = MbtileSet(mbtiles=opts.file, outdir=opts.output, origin=origin) File "/media/python-mbtiles-master/mbtiles.py", line 12, in init self.conn = sqlite3.connect(mbtiles) sqlite3.OperationalError: unable to open database file

what i have done wrong error kindly help