diff --git a/xy2-100-bsl/pd.py b/xy2-100-bsl/pd.py
index 554afb9..3388299 100644
--- a/xy2-100-bsl/pd.py
+++ b/xy2-100-bsl/pd.py
@@ -184,7 +184,8 @@ class Decoder(srd.Decoder):
             pos = pos if pos < 131072 else pos - 262144
         if(is_y==1):    
             self.y=pos
-            self.file.write('%d,%d,%d\n' % (self.x, self.y, self.z))
+            if self.filename != "":
+                self.file.write('%d,%d,%d\n' % (self.x, self.y, self.z))
         else:
             self.x=pos
         # 显示原始位置