diff --git a/Code/ControlPGN.py b/Code/ControlPGN.py
index 1b60525..94dd222 100644
--- a/Code/ControlPGN.py
+++ b/Code/ControlPGN.py
@@ -158,8 +158,10 @@ def actual(self):
             rival = self.gestor.libro.nombre
         elif tipoJuego in (kJugFics, kJugFide):
             rival = self.gestor.nombreObj
-        else:
+        elif self.gestor.xrival:
             rival = self.gestor.xrival.nombre
+        else:
+            rival = "";
 
         jugador = self.gestor.configuracion.jugador
         resultado = self.gestor.resultado
diff --git a/Code/QT/Histogram.py b/Code/QT/Histogram.py
index 49dc296..f7afb0f 100644
--- a/Code/QT/Histogram.py
+++ b/Code/QT/Histogram.py
@@ -431,8 +431,14 @@ def genHistograms(partida, sicentipawns):
     alm.lijgB = lijgB
 
     alm.porcT = porcT*1.0/len(lijg)
-    alm.porcW = porcW*1.0/len(lijgW)
-    alm.porcB = porcB*1.0/len(lijgB)
+    if len(lijgW) != 0:
+        alm.porcW = porcW*1.0/len(lijgW)
+    else:
+        alm.porcW = 0;
+    if len(lijgB) != 0:
+        alm.porcB = porcB*1.0/len(lijgB)
+    else:
+        alm.porcB = 0;
 
     return alm