WHY? WHY?

(mri) pxp@DESKTOP-ON7OQLP:/mnt/k/DTI_FBA/group$ fixelconnectivity fixel_mask/ tracks_2_million_sift.tck matrix/
fixelconnectivity: [100%] preloading data for “fixel_mask/directions.mif”
fixelconnectivity: [ 98%] computing fixel-fixel connectivity matrix…
fixelconnectivity: [SYSTEM FATAL CODE: SIGSEGV (11)] Segmentation fault: Invalid memory access