diff --git a/ACUtils.SqlDB2/ACUtils.SqlDB2.csproj b/ACUtils.SqlDB2/ACUtils.SqlDB2.csproj
index 8179c3a..9399682 100644
--- a/ACUtils.SqlDB2/ACUtils.SqlDB2.csproj
+++ b/ACUtils.SqlDB2/ACUtils.SqlDB2.csproj
@@ -5,8 +5,8 @@
     <Authors>Andrea Cattaneo</Authors>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
-    <Version>1.0.0.142</Version>
-    <PackageVersion>1.0.0.142</PackageVersion>
+    <Version>1.0.0.143</Version>
+    <PackageVersion>1.0.0.143</PackageVersion>
     <Description>Utility per interrogazione database DB2</Description>
     <NeutralLanguage>it</NeutralLanguage>
     <IncludeSymbols>true</IncludeSymbols>
diff --git a/ACUtils.SqlDB2/SqlDB2.cs b/ACUtils.SqlDB2/SqlDB2.cs
index 0ef6edb..9e1b5b1 100644
--- a/ACUtils.SqlDB2/SqlDB2.cs
+++ b/ACUtils.SqlDB2/SqlDB2.cs
@@ -455,8 +455,8 @@ public void CompleteTransaction()
         public void AbortTransaction()
         {
             useTransaction = false;
-            _transaction.Rollback();
-            _transaction.Dispose();
+            _transaction?.Rollback();
+            _transaction?.Dispose();
             _transaction = null;
         }