Import Error (Unsupported MRC datatype: 12) from Relion4.0 beta

Hi All,

I started to use Relion4.0 beta and tried to import one into CryoSPARC, then I got the following error:

Traceback (most recent call last):
File “cryosparc_master/cryosparc_compute/”, line 84, in
File “/data3/donghua/cryosparc/cryosparc_master/cryosparc_compute/jobs/imports/”, line 438, in run_import_particles
File “/data3/donghua/cryosparc/cryosparc_master/cryosparc_compute/”, line 93, in read_blobs
dtypes[rel_path] = mrc.mrc_datatype_to_dtype(hdr[‘datatype’])
File “/data3/donghua/cryosparc/cryosparc_master/cryosparc_compute/blobio/”, line 57, in mrc_datatype_to_dtype
assert False,‘Unsupported MRC datatype: {0}’.format(datatype)
AssertionError: Unsupported MRC datatype: 12

Please help. Thanks!

I was using the default option “Yes” for “Write output in float16” during Relion4.0 beta Particle extraction. When I changed to No for this option, the importing of was fine. Maybe CryoSPARC can support the float16 in the future.

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Hi @donghuachen,

Thanks for bringing this to our attention. We can definitely add float16 support. Keep an eye on the release notes for upcoming patches!


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