ValueError: need more than 0 values to unpack

[BenePhetes]

Traceback (most recent call last):
  File "./csv2dat.py", line 475, in <module>
    rval = main()
  File "./csv2dat.py", line 471, in main
    return cmd(opts, args)
  File "./csv2dat.py", line 439, in build_dat
    r.load(opts, args)
  File "./csv2dat.py", line 194, in load
    for nets, data in self.gen_nets(opts, args):
  File "./csv2dat.py", line 317, in gen_nets
    lo, hi = row[:2]
ValueError: need more than 0 values to unpack

`Please help on this error.