# CryoSPARC v4.2.0+230302 Release Notes

**Version:** v4.2.0+230302  
**Released:** March 2, 2023
**Source:** https://cryosparc.com/updates/v4.2.0+230302

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In <a href="https://guide.cryosparc.com/processing-data/all-job-types-in-cryosparc/ctf-refinement/job-global-ctf-refinement">Global CTF Refinement</a>, throw a warning if the spherical aberration refines to a nonpositive value.

In <a href="https://guide.cryosparc.com/processing-data/all-job-types-in-cryosparc/variability/job-3d-classification-beta">3D Classification</a>, add &quot;Force re-do FSC split” parameter that forces re-splitting the particles into half-set splits from scratch. Disabling this allows for preserving the input splits, for particles from previous helical refinements, symmetry expansions, or local refinements.

Fixed a problem in <a href="https://guide.cryosparc.com/processing-data/all-job-types-in-cryosparc/particle-curation/job-2d-classification">2D classification</a> where many classes would be blank or very faint if multiple GPUs were used.

Fixed issues when running multiple jobs using the same SSD cache space.

Fixed <a href="https://guide.cryosparc.com/processing-data/all-job-types-in-cryosparc/post-processing/job-threedfsc-wrapper">3DFSC</a> crashing due to list index out of range error.

In <a href="https://guide.cryosparc.com/processing-data/all-job-types-in-cryosparc/variability/job-3d-classification-beta">3D Classification</a>, removed extraneous <code>alignments3D</code> entry in <code>particles_all_classes</code> dataset output which caused <a href="https://github.com/asarnow/pyem/blob/master/csparc2star.py">csparc2star.py</a> to assign all particles to a single class.