3.1.2

This is a minor update from RELION 3.1.1. Everyone using RELION 3.1.1 or earlier should upgrade to this version. We will not investigate bug reports and questions on earlier versions.

Changes since RELION 3.1.1 include:

• We are migrating documentation from RELION wiki to ReadTheDocs.
• libtiff is no longer optional; it is necessary for compilation
• Switch to FFTW 3.3.8 from 3.3.4 (earlier versions are broken for GCC 8: http://www.fftw.org/release-notes.html)
• Support the AMD-optimized version of FFTW with the -DAMDFFTW ONoption in CMake
• 3DCTF: fix a bug reported by @dtegunov (#710)
• relion_image_handler: do not add image index to filenames in STAR file if an image file is not a stack (#705)
• CTFFIND wrapper: support (non-movie) TIFF images (#728, thanks to @gruchalla)
• GUI: do not add --sigma_rot, --sigma_tilt, --sigma_psi for local search in Refine3D
• Suppress warnings about private TIFF tags in EER (#735)
• Multibody: support SIDESPLITTER (please use the latest wrapper)
• Fix issues with undefined labels in STAR files (#641)
• Replace controversial technical terms regarding MPI (#739)

Unfortunately, there are several remaining issues to be fixed in later updates. Frequent problems include:

• Reboxing in a subtract job consumes a huge amount of RAM. This is actually a GLIBC, not RELION, issue. A workaround is described in #673.
• It might fail to compile with GCC and Intel MKL on some Linux distributions. A patch (58bffcb) is described in #731.

See https://github.com/3dem/relion/issues for details.