diff --git a/subworkflows/local/hic_mapping/main.nf b/subworkflows/local/hic_mapping/main.nf
index d6ceaf7f..4ecd368f 100755
--- a/subworkflows/local/hic_mapping/main.nf
+++ b/subworkflows/local/hic_mapping/main.nf
@@ -140,7 +140,7 @@ workflow HIC_MAPPING {
             //
             // LOGIC: MAKE YAHS INPUT
             //
-            ref_yahs.map { meta, ref -> ref }.set{ch_ref}
+            reference_tuple.map { meta, ref -> ref }.set{ch_ref}
             reference_index.map { meta, fai -> fai }.set{ch_fai}
 
             //
diff --git a/workflows/treeval.nf b/workflows/treeval.nf
index 02d828c1..28c57a70 100755
--- a/workflows/treeval.nf
+++ b/workflows/treeval.nf
@@ -96,7 +96,7 @@ workflow TREEVAL {
     log.info "[Treeval: Info] PROCESSES TO RUN INCLUDE: $include_workflow_steps"
 
     // Validate that all requested steps are valid
-    def invalid_steps = exclude_steps_list - all_steps_list
+    invalid_steps = exclude_steps_list - all_steps_list
     if (invalid_steps) {
         log.error "[Treeval: Error] Invalid step(s) specified in --steps: ${invalid_steps.join(", ")}"
         log.error "[Treeval: Error] Valid options are: ${all_steps_list.join(", ")}"
@@ -104,7 +104,7 @@ workflow TREEVAL {
     }
 
     // Validate that include_workflow_steps contains only valid steps (safety check)
-    def invalid_include_steps = include_workflow_steps - all_steps_list
+    invalid_include_steps = include_workflow_steps - all_steps_list
     if (invalid_include_steps) {
         log.error "[Treeval: Error] Internal error - invalid workflow steps detected: ${invalid_include_steps.join(", ")}"
         System.exit(1)