Validate that nextflow is using downloaded images.

[redvoidling]

Nextflow fails to find my pre-downloaded Singularity images.

I set singularity.cacheDir = "~/downloads/nf_imgs/" in the config, but when I run the pipeline it still tries to pull images and shows the error “Failed to pull singularity image.”

I am running this on a cluster where downloads from most sources are not allowed. I need Nextflow to use the existing .img files in the specified folder instead of trying to pull new ones.

[dvg-p4]

You can use container "file://..." to specify an explicit path to a pre-downloaded sif that will never try to pull from docker.

[redvoidling]

Thank you for your reply!

I found that most of the Singularity downloads are no longer accessible, at least not on the HPC infrastructure I’m using. I switched to Apptainer instead, and that solved the issue.

[bentsherman]

Closing since this issue seems to be resolved