diff --git a/MP.Core/Objects/MachDataItem.cs b/MP.Core/Objects/MachDataItem.cs
index 32bf1e56..dd89ab85 100644
--- a/MP.Core/Objects/MachDataItem.cs
+++ b/MP.Core/Objects/MachDataItem.cs
@@ -13,13 +13,13 @@ namespace MP.Core.Objects
 
         public DataItemCategory Category { get; set; }
 
-        public string Name { get; set; } = "";
+        public string? Name { get; set; } = "";
 
-        public string SubType { get; set; } = "";
+        public string? SubType { get; set; } = "";
 
-        public string Type { get; set; } = "";
+        public string? Type { get; set; } = "";
 
-        public string Units { get; set; } = "";
+        public string? Units { get; set; } = "";
 
     }
 }
diff --git a/MP.IOC/Controllers/IOBController.cs b/MP.IOC/Controllers/IOBController.cs
index e0cfe9e4..a4ef018f 100644
--- a/MP.IOC/Controllers/IOBController.cs
+++ b/MP.IOC/Controllers/IOBController.cs
@@ -1011,7 +1011,7 @@ namespace MP.IOC.Controllers
         /// <param name="id">ID dell'IOB</param>
         /// <returns></returns>
         [HttpPost("saveDataItems/{id}")]
-        public async Task<IActionResult> SaveDataItems(string id, [FromBody] string content = "")
+        public async Task<IActionResult> SaveDataItems(string id, [FromBody] List<MachDataItem> dataList)
         {
             if (string.IsNullOrEmpty(id)) return BadRequest("Missing ID");
 
@@ -1021,7 +1021,7 @@ namespace MP.IOC.Controllers
             string answ = "";
             try
             {
-                bool done = await DService.SaveDataItemsAsync(id, content);
+                bool done = await DService.SaveDataItemsAsync(id, dataList);
                 answ = done ? "OK" : "KO";
             }
             catch (Exception exc)