diff --git a/MP-ADM/WebUserControls/cmp_CompanySelector.ascx.cs b/MP-ADM/WebUserControls/cmp_CompanySelector.ascx.cs
index 7f8d3289..27b7df51 100644
--- a/MP-ADM/WebUserControls/cmp_CompanySelector.ascx.cs
+++ b/MP-ADM/WebUserControls/cmp_CompanySelector.ascx.cs
@@ -1,4 +1,5 @@
-using SteamWare;
+using MapoDb;
+using SteamWare;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -51,6 +52,8 @@ namespace MP_ADM.WebUserControls
             if (!string.IsNullOrEmpty(aziendaSel))
             {
                 memLayer.ML.updateAppConf("AZIENDA", aziendaSel);
+                // resetto cache filtro articoli
+                memLayer.ML.setRSV(DataLayer.redKeyTabCheckArt,"");
             }
             showBtn(false);
         }
diff --git a/MP-ADM/WebUserControls/mod_anagArticoli.ascx.cs b/MP-ADM/WebUserControls/mod_anagArticoli.ascx.cs
index 6251c9d7..b6987ad6 100644
--- a/MP-ADM/WebUserControls/mod_anagArticoli.ascx.cs
+++ b/MP-ADM/WebUserControls/mod_anagArticoli.ascx.cs
@@ -2,6 +2,7 @@
 using Newtonsoft.Json;
 using SteamWare;
 using System;
+using System.Collections.Generic;
 using System.Data;
 using System.Web.UI.WebControls;
 
@@ -17,8 +18,8 @@ namespace MP_ADM.WebUserControls
             bool answ = false;
             string codArticolo = $"{_idx}";
             // cerco in cache redis...
-            string redKeyArtUsed = DataLayer.mHash($"CACHE:CheckArtUsed:{codArticolo}");
-            string redKeyTabCheckArt = DataLayer.mHash($"CACHE:TabCheckArt");
+            string redKeyArtUsed = $"{ DataLayer.redKeyArtUsed}:{codArticolo}";
+            string redKeyTabCheckArt = DataLayer.redKeyTabCheckArt;
             string rawData = memLayer.ML.getRSV(redKeyArtUsed);
             if (!string.IsNullOrEmpty(rawData))
             {
@@ -31,24 +32,34 @@ namespace MP_ADM.WebUserControls
                 {
                     // cerco in cache se ci sia la tabella con gli articoli impiegati...
                     string rawTable = memLayer.ML.getRSV(redKeyTabCheckArt);
-                    DS_ProdTempi.AnagArticoliDataTable tabArticoli = new DS_ProdTempi.AnagArticoliDataTable();
+                    List<string> artList = new List<string>();
                     if (!string.IsNullOrEmpty(rawTable))
                     {
-                        tabArticoli = JsonConvert.DeserializeObject<DS_ProdTempi.AnagArticoliDataTable>(rawTable);
+                        artList = JsonConvert.DeserializeObject<List<string>>(rawTable);
                     }
                     // rileggo...
-                    if (tabArticoli == null || tabArticoli.Count == 0)
+                    if (artList == null || artList.Count == 0)
                     {
-                        tabArticoli = DataLayerObj.taAnagArt.getUsed();
+                        var tabArticoli = DataLayerObj.taAnagArt.getUsed();
+                        var codList = tabArticoli.Select(x => x.CodArticolo);
+                        foreach (string cod in codList)
+                        {
+                            artList.Add(cod);
+                        }
+                        // SE fosse vuoto aggiungo comunque il cado "ND"...
+                        if (artList.Count == 0)
+                        {
+                            artList.Add("ND");
+                        }
                         // salvo
-                        rawTable = JsonConvert.SerializeObject(tabArticoli);
+                        rawTable = JsonConvert.SerializeObject(artList);
                         memLayer.ML.setRSV(redKeyTabCheckArt, rawTable, 60 * memLayer.ML.cdvi("cacheCheckArtUsato"));
                     }
                     // cerco nella tabella: se ci fosse --> disabilitato delete
                     bool usato = false;
-                    if (tabArticoli != null && tabArticoli.Rows.Count > 0)
+                    if (artList != null && artList.Count > 0)
                     {
-                        usato = tabArticoli.Rows.Contains(codArticolo);
+                        usato = artList.Contains(codArticolo);
                     }
                     answ = !usato;
                     memLayer.ML.setRSV(redKeyArtUsed, $"{answ}", 60 * memLayer.ML.cdvi("cacheCheckArtUsato"));
diff --git a/MapoDb/DataLayer.cs b/MapoDb/DataLayer.cs
index 4e13332d..e3892c82 100644
--- a/MapoDb/DataLayer.cs
+++ b/MapoDb/DataLayer.cs
@@ -126,6 +126,15 @@ namespace MapoDb
             }
         }
 
+        public static string redKeyArtUsed
+        {
+            get => mHash($"CACHE:CheckArtUsed");
+        }
+        public static string redKeyTabCheckArt
+        {
+            get => mHash($"CACHE:TabCheckArt");
+        }
+
         /// <summary>
         /// Cognome Nome da MatrOpr in sessione
         /// </summary>