BIDS validator error for reverse phase encoded image

I can’t see what the problem is here. I have a reverse phase encoded image for DWI. Running BIDS Validator (v. 1.9.3) via Singularity throws the error pasted below. QSIPrep, however, shows “Valid dataset”:

singularity run -B $PWD/nifti/:/data validator-1.9.3.sif /data
	1: [ERR] Files with such naming scheme are not part of BIDS specification. This error is most commonly caused by typos in file names that make them not BIDS compatible. Please consult the specification and make sure your files are named correctly. If this is not a file naming issue (for example when including files not yet covered by the BIDS specification) you should include a ".bidsignore" file in your dataset (see for details). Please note that derived (processed) data should be placed in /derivatives folder and source data (such as DICOMS or behavioural logs in proprietary formats) should be placed in the /sourcedata folder. (code: 1 - NOT_INCLUDED)
			Evidence: sub-168_ses-base_epi.json
			Evidence: sub-168_ses-base_epi.nii.gz

Hi @Adam_Raikes ,

For this fmap acquisition you need to specify the dir entity label. This portion of the BIDS specification provides more detail.

Right. Thanks. I knew it was something and just couldn’t see it.