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-rw-r--r--wqflask/wqflask/correlation/rust_correlation.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/wqflask/wqflask/correlation/rust_correlation.py b/wqflask/wqflask/correlation/rust_correlation.py
index bf81dd11..214a47e7 100644
--- a/wqflask/wqflask/correlation/rust_correlation.py
+++ b/wqflask/wqflask/correlation/rust_correlation.py
@@ -194,7 +194,7 @@ def compute_top_n_tissue(this_dataset, this_trait, traits, method):
                                   dataset_symbols=trait_symbol_dict,
                                   dataset_vals=corr_result_tissue_vals_dict)    
 
-    if data[0]:
+    if data and data[0]:
         return run_correlation(
             data[1], data[0], method, ",", "tissue")