Hi there!

Thanks for telling us about a problem with the pipeline. Please delete this text and anything that's not relevant from the template below:

#### Describe the bug
A clear and concise description of what the bug is.

#### Steps to reproduce
Steps to reproduce the behaviour:
1. Command line: `nextflow run ...`
2. See error: _Please provide your error message_

#### Expected behaviour
A clear and concise description of what you expected to happen.

#### System:
 - Hardware: [e.g. HPC, Desktop, Cloud...]
 - Executor: [e.g. slurm, local, awsbatch...]
 - OS: [e.g. CentOS Linux, macOS, Linux Mint...]
 - Version [e.g. 7, 10.13.6, 18.3...]

#### Nextflow Installation:
 - Version: [e.g. 0.31.0]

#### Container engine:
 - Engine: [e.g. Conda, Docker or Singularity]
 - version: [e.g. 1.0.0]
 - Image tag: [e.g. nfcore/chipseq:1.0.0]

#### Additional context
Add any other context about the problem here.
