diff --git a/schainpy/model/jrodata.py b/schainpy/model/jrodata.py
index f4929a2..429a5d4 100644
--- a/schainpy/model/jrodata.py
+++ b/schainpy/model/jrodata.py
@@ -77,6 +77,10 @@ class JROData:
         
         return copy.deepcopy(self)
     
+    def isEmpty(self):
+        
+        return flagNoData
+    
 class Voltage(JROData):
     
     nCohInt = None