# nextflow on Rackham and Bianca

Offline mirror of the stable nf-core-piplenes is available on Rackham and Bianca via

$ module load bioinfo-tools nf-core-pipelines/latest

This will load `nextflow` as requirement as well.
**As it appears, some pipelines might need different version of nextflow to work, which is beyond what the software module system is capable to resolve.**

**Update 2023.06.20:** `nf-core-pipelines/latest` now will load the latest version of `nextflow`. If you need to use different/older version of the tool you can switch by setting the environmental variable [NXF_VER] to one of the pre-installed.

You can check which versions are pre-installed:

$ ls /sw/bioinfo/Nextflow/latest/rackham/nxf_home/framework/

20.04.1  20.07.1  20.10.0  21.04.3  21.10.6  22.10.1  22.10.2  22.10.3  22.10.4  22.10.8  23.04.1  23.04.2

Example:

# Load nf-core-pipelines
$ module load bioinfo-tools nf-core-pipelines/latest

Nextflow not loaded, will load Nextflow

Note that NXF_HOME is set to $HOME/.nextflow
Please change NXF_HOME to a place in your project directory (export NXF_HOME=yourprojectfolder)

Please use   export NXF_VER=nextflow_version    to select different version
https://www.nextflow.io/docs/latest/config.html#environment-variables


# check nextflow version
$ nextflow -v
nextflow version 23.04.2.5870

# change the nextflow version using the internal version mechanism
export NXF_VER=22.10.8
$ nextflow -v
nextflow version 22.10.8.5859

## Contacts:
- [Pavlin Mitev](https://katalog.uu.se/profile/?id=N3-1425)
- [UPPMAX](https://www.uppmax.uu.se/)
- [AE@UPPMAX - related documentation](/8sqXISVRRquPDSw9o1DizQ)


[NXF_VER]: https://www.nextflow.io/docs/latest/config.html?highlight=nxf_ver#environment-variables

###### tags: `UPPMAX`, `nextflow`