ccpem/mrcfile

Error when opening MotionCor2 output

ssscj opened this issue · 2 comments

ssscj commented

Hi developers,
Thanks for this useful package. I met a problem when using it to open a single frame data from MotionCor2. Here is the error.
In [9]: mrcfile.validate('20200713avg.mrc')
/software/anaconda/lib/python3.7/site-packages/mrcfile/mrcinterpreter.py:208: RuntimeWarning: Map ID string not found - not an MRC file, or file is corrupt warnings.warn(msg, RuntimeWarning) Map ID string is incorrect: found b'MAP', should be b'MAP ' Error in data statistics: RMS deviation is 31.696720123291016 but the value in the header is 0.0
Out[9]: False
Thanks for your help.

colinpalmer commented

Unfortunately this is a known problem with files from MotionCor2. The file ID string is not quite correct. You can open these files with mrcfile by using the permissive argument, for example: mrcfile.open('20200713avg.mrc', permissive=True).

  • 👍1
ssscj commented

It works, thanks for your help!