raven not recognising it's own tags/options when run on a conda environment (trycycler)

[bm968]

(tricycler) jovyan:/shared/team/USER/NEW_NANPORE/Colony1_Denovo_Assembly$ raven --threads "$threads" --disable-checkpoints --graphical-fragment-assembly assemblies/assembly_03.gfa C1_P1_subsets/sample_03.fastq > assemblies/assembly_03.fasta
Usage: raven [options]

raven: error: no such option: --threads
(tricycler) jovyan:/shared/team/Brian/NEW_NANOPORE_151225/Colony1_Denovo_Assembly$ raven --disable-checkpoints --graphical-fragment-assembly assemblies/assembly_03.gfa C1_P1_subsets/sample_03.fastq > assemblies/assembly_03.fasta
Usage: raven [options]

raven: error: no such option: --disable-checkpoints