diff --git a/Jenkinsfile b/Jenkinsfile
index 6c733369..1eece216 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -17,7 +17,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=831']) {
+        withEnv(['NEXT_BUILD_NUMBER=833']) {
           // env.versionNumber = VersionNumber(versionNumberString : '6.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '6.0.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
             env.APP_NAME = 'MAPO'
diff --git a/MP-TAB/WebUserControls/mod_dettMacchina.ascx b/MP-TAB/WebUserControls/mod_dettMacchina.ascx
index aa50a2cc..63c62f3c 100644
--- a/MP-TAB/WebUserControls/mod_dettMacchina.ascx
+++ b/MP-TAB/WebUserControls/mod_dettMacchina.ascx
@@ -51,7 +51,7 @@
             </div>
           </div>
           <div class="col-3 col-sm-2 pl-0">
-            <asp:HyperLink runat="server" ID="hlDisegno" NavigateUrl='<%# urlDisegno(Eval("CodArticolo")) %>' CssClass="btn btn-secondary btn-sm btn-block small" Target="_blank">
+            <asp:HyperLink runat="server" ID="hlDisegno" NavigateUrl='<%# urlDisegno(Eval("CodArticolo")) %>'  Visible='<%# showDisegno(Eval("CodArticolo")) %>' CssClass="btn btn-secondary btn-sm btn-block small" Target="_blank">
               <i class="fa fa-file-pdf-o fa-2x"></i><br /><div class="small">DISEGNO</div>
             </asp:HyperLink>
           </div>
diff --git a/MP-TAB/WebUserControls/mod_dettMacchina.ascx.cs b/MP-TAB/WebUserControls/mod_dettMacchina.ascx.cs
index a470f99d..58aa596f 100644
--- a/MP-TAB/WebUserControls/mod_dettMacchina.ascx.cs
+++ b/MP-TAB/WebUserControls/mod_dettMacchina.ascx.cs
@@ -1,7 +1,6 @@
 using MapoDb;
 using SteamWare;
 using System;
-using System.Web;
 using System.Web.UI;
 
 namespace MoonProTablet.WebUserControls
@@ -27,6 +26,31 @@ namespace MoonProTablet.WebUserControls
       }
     }
 
+    public bool showDisegno(object _codArticolo)
+    {
+      // default è ND...
+      bool answ = false;
+      // recupero da anagrafica articoli...
+      try
+      {
+        DS_ProdTempi.AnagArticoliDataTable tab = DataLayer.obj.taAnagArt.getByCod(_codArticolo.ToString());
+        if (tab.Rows.Count > 0)
+        {
+          //DS_ProdTempi.AnagArticoliRow riga = DataLayer.obj.taAnagArt.getByCod(_codArticolo.ToString())[0];
+          DS_ProdTempi.AnagArticoliRow riga = tab[0];
+          answ = (riga.Disegno != "");
+        }
+        else
+        {
+          logger.lg.scriviLog(string.Format("Attenzione! nessuna informazione trovata per l'articolo {0}", _codArticolo), tipoLog.WARNING);
+        }
+      }
+      catch (Exception exc)
+      {
+        logger.lg.scriviLog(string.Format("Errore in ricostruzione URL disegno:{0}{1}", Environment.NewLine, exc), tipoLog.EXCEPTION);
+      }
+      return answ;
+    }
     /// <summary>
     /// caricamento pagina
     /// </summary>