diff --git a/.github/workflows/burn_cell_metal_chem.yml b/.github/workflows/burn_cell_metal_chem.yml
index 7bd6268f0..68cb372df 100644
--- a/.github/workflows/burn_cell_metal_chem.yml
+++ b/.github/workflows/burn_cell_metal_chem.yml
@@ -71,6 +71,7 @@ jobs:
             ref_file="${ref_map[$Z]}"
 
             error_found=false
+            index = 0
             for line_number in $line_numbers; do
               value1=$(awk 'NR=='"$line_number"' {match($0, /[+-]?[0-9]+([.][0-9]+)?[eE]?[+-]?[0-9]+/); if (RSTART) print substr($0, RSTART, RLENGTH); else print 0}' $output_file)