Ошибка: pandas.errors.ParserError: Error tokenizing data. C error: Expected 1 fields in line 5, saw 9

Пытаюсь зугрузить tsv–файл в pandas.

import pandas as pddf = pd.read_csv(filename, sep='\t')print(df)

После выполнения этого кода в консоли вижу ошибку

df = pd.read_csv(filename, sep='\t') File ""/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/parsers.py"", line 655, in parser_fretu _read(filepath_or_buffer, kwds) File ""/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/parsers.py"", line 411, in _readdata = parser.read(nrows) File ""/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/parsers.py"", line 982, in readret = self._engine.read(nrows) File ""/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/parsers.py"", line 1719, in readdata = self._reader.read(nrows) File ""pandas/_libs/parsers.pyx"", line 890, in pandas._libs.parsers.TextReader.read (pandas/_libs/parsers.c:10862) File ""pandas/_libs/parsers.pyx"", line 912, in pandas._libs.parsers.TextReader._read_low_memory (pandas/_libs/parsers.c:11138) File ""pandas/_libs/parsers.pyx"", line 966, in pandas._libs.parsers.TextReader._read_rows (pandas/_libs/parsers.c:11884) File ""pandas/_libs/parsers.pyx"", line 953, in pandas._libs.parsers.TextReader._tokenize_rows (pandas/_libs/parsers.c:11755) File ""pandas/_libs/parsers.pyx"", line 2184, in pandas._libs.parsers.raise_parser_error (pandas/_libs/parsers.c:28765) pandas.errors.ParserError: Error tokenizing data. C error: Expected 1 fields in line 5, saw 9

Подскажите, в чем может быть проблема?