External Email - Use Caution
Hello,
I have trouble reading some of my raw data files. They seem pretty random
-- two are empty room recordings from two different participants recorded
at the end of the session, three are task files, while the other files are
fine. The error is "file does not start with a file id tag". Below are the
details. Could you help me with this? Thank you very much!
Link to one of the data files:
https://drive.google.com/open?id=1hwOH0Gh0KOqFpFl0-4HHlr6oZliROaL8
Output:
Opening raw data file EmptyRoom_raw.fif...
---------------------------------------------------------------------------ValueError
Traceback (most recent call
last)<ipython-input-87-3e7740fb39a4> in <module> 6
fname_projs = "erm-proj.fif" 7 fname_erm_wproj =
"EmptyRoom_wproj_raw.fif"----> 8 raw_erm =
mne.io.read_raw_fif(fname_erm, preload=True) 9
raw_erm.add_proj([],remove_existing=True) 10
raw_erm.info['bads'] = ['MEG0432','MEG2233','MEG2543']
~/anaconda3/lib/python3.7/site-packages/mne/io/fiff/raw.py in
read_raw_fif(fname, allow_maxshield, preload, verbose) 468 """
469 return Raw(fname=fname, allow_maxshield=allow_maxshield,-->
470 preload=preload,
verbose=verbose)</Users/xif20/anaconda3/lib/python3.7/site-packages/mne/externals/decorator.py:decorator-gen-160>
in __init__(self, fname, allow_maxshield, preload, verbose)
~/anaconda3/lib/python3.7/site-packages/mne/utils/_logging.py in
wrapper(*args, **kwargs) 87 with
use_log_level(verbose_level): 88 return
function(*args, **kwargs)---> 89 return function(*args,
**kwargs) 90 return FunctionMaker.create( 91
function, 'return decfunc(%(signature)s)',
~/anaconda3/lib/python3.7/site-packages/mne/io/fiff/raw.py in
__init__(self, fname, allow_maxshield, preload, verbose) 83
raw, next_fname, buffer_size_sec = \ 84
self._read_raw_file(next_fname, allow_maxshield,---> 85
preload, do_check_fname) 86
do_check_fname = False 87 raws.append(raw)
</Users/xif20/anaconda3/lib/python3.7/site-packages/mne/externals/decorator.py:decorator-gen-161>
in _read_raw_file(self, fname, allow_maxshield, preload,
do_check_fname, verbose)
~/anaconda3/lib/python3.7/site-packages/mne/utils/_logging.py in
wrapper(*args, **kwargs) 87 with
use_log_level(verbose_level): 88 return
function(*args, **kwargs)---> 89 return function(*args,
**kwargs) 90 return FunctionMaker.create( 91
function, 'return decfunc(%(signature)s)',
~/anaconda3/lib/python3.7/site-packages/mne/io/fiff/raw.py in
_read_raw_file(self, fname, allow_maxshield, preload, do_check_fname,
verbose) 151 whole_file = True 152 fname_rep
= _get_fname_rep(fname)--> 153 ff, tree, _ = fiff_open(fname,
preload=whole_file) 154 with ff as fid: 155
# Read the measurement info
</Users/xif20/anaconda3/lib/python3.7/site-packages/mne/externals/decorator.py:decorator-gen-6>
in fiff_open(fname, preload, verbose)
~/anaconda3/lib/python3.7/site-packages/mne/utils/_logging.py in
wrapper(*args, **kwargs) 87 with
use_log_level(verbose_level): 88 return
function(*args, **kwargs)---> 89 return function(*args,
**kwargs) 90 return FunctionMaker.create( 91
function, 'return decfunc(%(signature)s)',
~/anaconda3/lib/python3.7/site-packages/mne/io/open.py in
fiff_open(fname, preload, verbose) 129 # Check that this
looks like a fif file 130 if tag.kind != FIFF.FIFF_FILE_ID:-->
131 raise ValueError('file does not start with a file id tag')
132 133 if tag.type != FIFF.FIFFT_ID_STRUCT:
ValueError: file does not start with a file id tag
Best,
Xiaoping