Error in "Ab initio" run

Hi,

Quite recently, I’ve encountered the following error a few times in ab initio runs. In this case, the app reported an error at round 296 (of 6497).
Hope it is not too bad,

Best,

Jean-Paul

Traceback (most recent call last):
File “/mnt/cache/cryosparc/cryosparc/cryosparc-compute/sparc/streamlog.py”, line 321, in run_with_except_hook
run_old(*args, **kw)
File “/mnt/data/cryosparc/cryosparc/cryosparc/anaconda2/lib/python2.7/threading.py”, line 754, in run
self.__target(*self.__args, **self.__kwargs)
File “/mnt/cache/cryosparc/cryosparc/cryosparc-compute/dataio/data.py”, line 280, in work
img.get_prepared_fspace_data() # prepare if not already cached
File “/mnt/cache/cryosparc/cryosparc/cryosparc-compute/dataio/data.py”, line 137, in get_prepared_fspace_data
self.prepare_fspace_data()
File “/mnt/cache/cryosparc/cryosparc/cryosparc-compute/dataio/data.py”, line 146, in prepare_fspace_data
fourier.fft(self.prepared_real_data),
File “/mnt/cache/cryosparc/cryosparc/cryosparc-compute/fourier.py”, line 104, in fft
assert x.ndim in [2,3] , “fourier.F only supports 2D or 3D transforms!”
AttributeError: ‘NoneType’ object has no attribute ‘ndim’