From e2647916b051f5d46ccb24e08a6c97cbb8f668f2 Mon Sep 17 00:00:00 2001
From: zsloan
Date: Fri, 12 Nov 2021 16:27:03 +0000
Subject: This change prevents an error caused by trying to export mapping
 results for a ProbeSet trait when there is no gene symbol

---
 wqflask/wqflask/marker_regression/run_mapping.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wqflask/wqflask/marker_regression/run_mapping.py b/wqflask/wqflask/marker_regression/run_mapping.py
index 769b9240..9d70bb15 100644
--- a/wqflask/wqflask/marker_regression/run_mapping.py
+++ b/wqflask/wqflask/marker_regression/run_mapping.py
@@ -556,7 +556,8 @@ def export_mapping_results(dataset, trait, markers, results_path, mapping_method
                 transform_text = ""
             output_file.write(transform_text + "\n")
         if dataset.type == "ProbeSet":
-            output_file.write("Gene Symbol: " + trait.symbol + "\n")
+            if trait.symbol:
+                output_file.write("Gene Symbol: " + trait.symbol + "\n")
             output_file.write("Location: " + str(trait.chr) + \
                               " @ " + str(trait.mb) + " Mb\n")
         if len(covariates) > 0:
-- 
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