diff --git a/IOB-WIN-NEXT/AdapterFormNext.cs b/IOB-WIN-NEXT/AdapterFormNext.cs
index 6b43af03..fff6bc0f 100644
--- a/IOB-WIN-NEXT/AdapterFormNext.cs
+++ b/IOB-WIN-NEXT/AdapterFormNext.cs
@@ -27,7 +27,7 @@ namespace IOB_WIN_NEXT
         /// <summary>
         /// carica IOB richiesto
         /// </summary>
-        protected override void loadIobType()
+        protected override async Task loadIobType()
         {
             if (IOBConfFull != null)
             {
@@ -45,6 +45,10 @@ namespace IOB_WIN_NEXT
                         btnStart.Enabled = false;
                         break;
                 }
+                if (!await iobInitAsync())
+                {
+                    return;
+                }
                 UpdateDisplTypeIobSel();
             }
         }