diff --git a/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs b/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
index 461927b..6495b6a 100644
--- a/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
+++ b/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
@@ -1815,6 +1815,7 @@ namespace MTC_Adapter
         contGiriElettrom[i] = contTotGiri;
         currNumCambiUt[i] = contNumCU;
         istGiriElettrom[i] = new sampleVect();
+        istNumCambiUt[i] = new sampleVect();
       }
       // imposto num assi e leggo valori salvati...
       contDistMovAssi = new double[currAdpConf.nAxis];