[scipion-users] relion classification of xmipp binned particles

[Juha H. <ju...@st...>]

Dear all,

I need to run a fairly large classification run. To speed it up, I have run
xmipp-crop/resize particles to achieve binning by factor of 3 and then
normalised the particles again with xmipp-preprocess particles.

Without binning/renormalization the job runs fine (albeit slowly). With
binning/renormalization I get a segmentation fault referring to libfftw3
right when the 'Estimating initial noise spectra' starts. I am running on
GPU.

The only difference I can see between the two is that after
binning/renormalization all the particles are in one large stack, whereas
normally they are in several separate stacks. Has anyone else seen this
behaviour? Any suggestions?

Best wishes,
Juha