Comment (by Samuel Cupp):

I pushed a commit to wvuthorns_diagnostics to change the CCTK_GFINDEX4D to CCTK_VECTGFINDEX3D for Seed_Magnetic_Fields_BNS, particle_tracerET, and smallbPoynET. If there are any issues, let me know.

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2741/some-thorns-seem-to-incorrectly-use