Hi @drichman,
I’m investigating the files you sent me now, but I tried a few examples myself and didn’t come across any issues:
For example, my micrographs have the following path (this is a relative path, but that doesn’t matter- only the actual filename matters):
J173/imported/10804479902352024517_HYZ_20200724_030153_fractions_patch_aligned_ctf_diag_2D.mrc

And in my .star file, I have the following as the rlnImageName: 000031@Extract/job015/movies1/HYZ_20200724_073602_fractions.mrcs
and the following as the rlnMicrographName : MotionCorr/job004/movies1/HYZ_20200724_073602_fractions.mrc
Therefore, in my Import Particles job, I connected the micrographs as inputs,
then specified the following for the parameters:

I cut the first 21 characters from the input micrograph path (which is the long unique identifier we recently added to all micrographs), then cut the last 30 characters, which I had to do to match the rlnMicrographName (notice this includes the extension). I then cut the extension from the rlnMicrographName in order to match the input micrograph name.
And the job worked:

I hope this helps.