diff --git a/workflows/scflow.nf b/workflows/scflow.nf
index 9f27efd..8368780 100644
--- a/workflows/scflow.nf
+++ b/workflows/scflow.nf
@@ -27,7 +27,7 @@ if (params.celltype_mappings) { ch_celltype_mappings = file(params.celltype_mapp
 if (params.ensembl_mappings) { ch_ensembl_mappings = file(params.ensembl_mappings, checkIfExists: false) }
 if (params.ensembl_mappings) { ch_ensembl_mappings2 = file(params.ensembl_mappings, checkIfExists: false) }
 if (params.ensembl_mappings) { ch_ensembl_mappings3 = file(params.ensembl_mappings, checkIfExists: false) }
-if (params.reddim_genes_yml) { ch_reddim_genes_yml = file(params.reddim_genes_yml, checkIfExists: true) }
+if (params.reddim_genes_yml) { ch_reddim_genes_yml = file(params.reddim_genes_yml, checkIfExists: false) }
 
 /*
 ========================================================================================