diff --git a/schainpy/IO/TestReader.py b/schainpy/IO/TestReader.py
index f979e38..1d7be27 100644
--- a/schainpy/IO/TestReader.py
+++ b/schainpy/IO/TestReader.py
@@ -6,7 +6,7 @@ Created on 23/01/2012
 
 import Voltage
 import datetime
-import time
+import time, datetime
 
 objReader = Voltage.VoltageReader()
 
@@ -15,8 +15,8 @@ path = '/home/roj-idl71/Data/RAWDATA/DP_Faraday/'
 #path = '/remote/puma/2011_03/DP_Faraday'
 
 
-startDateTime = datetime.datetime(2011,3,11,16,0,0)
-endDateTime = datetime.datetime(2011,3,12,20,1,0)
+startDateTime = datetime.datetime(2011,3,11,16,40,0)
+endDateTime = datetime.datetime(2011,3,11,16,59,0)
 
 t0 = time.time()
 objReader.setup(path, startDateTime, endDateTime)
@@ -26,9 +26,10 @@ print time.time() - t0
 while(not(objReader.noMoreFiles)):
     
     objReader.getData()
-#    if objReader.flagIsNewFile:
+    if objReader.flagIsNewBlock:
+        print "Block No %04d, Time: %s" %(objReader.nReadBlocks, datetime.datetime.fromtimestamp(objReader.m_BasicHeader.utc))
 #        print objReader.m_BasicHeader.dataBlock
     #print objReader.objStructShortHeader.dataBlock
-    #print time.localtime(objReader.m_BasicHeader.utc)
+        
     
     
\ No newline at end of file
diff --git a/schainpy/IO/Voltage.py b/schainpy/IO/Voltage.py
index 6507b75..2ed1590 100644
--- a/schainpy/IO/Voltage.py
+++ b/schainpy/IO/Voltage.py
@@ -43,12 +43,16 @@ class VoltageReader(DataReader):
     
     __maxTimeStep = 5 
     
-    flagResetProcessing = 0
-    
     __flagIsNewFile = 0
     
+    flagResetProcessing = 0    
+    
+    flagIsNewBlock = 0
+    
     noMoreFiles = 0
     
+    nReadBlocks = 0
+    
     online = 0
     
     filename = None
@@ -241,8 +245,7 @@ class VoltageReader(DataReader):
         elif data_type == 5:
             tmp=numpy.dtype([('real','<f8'),('imag','<f8')])
         else:
-            print 'no define data type'
-            tmp = 0
+            raise ValueError, 'Data type was not defined'
         
         self.__dataType = tmp
         self.__fileSizeByHeader = self.m_ProcessingHeader.dataBlocksPerFile * self.m_ProcessingHeader.blockSize + self.firstHeaderSize + self.basicHeaderSize*(self.m_ProcessingHeader.dataBlocksPerFile - 1)        
@@ -316,6 +319,7 @@ class VoltageReader(DataReader):
         self.flagResetProcessing = 0
         if deltaTime > self.__maxTimeStep:
             self.flagResetProcessing = 1
+            self.nReadBlocks = 0
             
         return 1
     
@@ -334,6 +338,10 @@ class VoltageReader(DataReader):
         
         self.__flagIsNewFile = 0
         
+        self.flagIsNewBlock = 1
+        
+        self.nReadBlocks += 1
+        
         self.__buffer = data
         
         self.__buffer_id = 0
@@ -361,6 +369,7 @@ class VoltageReader(DataReader):
         lectura es necesario hacer una nueva lectura de los bloques de datos usando "readNextBlock"
         """
         self.flagResetProcessing = 0
+        self.flagIsNewBlock = 0
         
         if self.__hasNotDataInBuffer():            
             self.readNextBlock()