diff --git a/debug/accuracy_tools/msprobe/mindspore/grad_probe/grad_analyzer.py b/debug/accuracy_tools/msprobe/mindspore/grad_probe/grad_analyzer.py
index c46d55b7b481bc89a56f2eac997c1618fb2cdda2..79f56436239e13a14b5826a693f634f08e157926 100644
--- a/debug/accuracy_tools/msprobe/mindspore/grad_probe/grad_analyzer.py
+++ b/debug/accuracy_tools/msprobe/mindspore/grad_probe/grad_analyzer.py
@@ -245,6 +245,8 @@ class CSVGenerator(Process):
         return ["Max", "Min", "Norm", "Shape"]
 
     def get_dist_header(self) -> List[str]:
+        if not self.bounds:
+            return []
         intervals = []
         for i, _ in enumerate(self.bounds):
             if i == 0: