diff --git a/src/AasxServerStandardBib/Interfaces/IAdminShellPackageEnvironmentService.cs b/src/AasxServerStandardBib/Interfaces/IAdminShellPackageEnvironmentService.cs
index f1ea08a04..5d47ae74f 100644
--- a/src/AasxServerStandardBib/Interfaces/IAdminShellPackageEnvironmentService.cs
+++ b/src/AasxServerStandardBib/Interfaces/IAdminShellPackageEnvironmentService.cs
@@ -6,6 +6,9 @@ namespace AasxServerStandardBib.Interfaces
 {
     public interface IAdminShellPackageEnvironmentService
     {
+        #region Other
+        public void setWrite(int packageIndex, bool status);
+        #endregion
         #region AssetAdministrationShell
         IAssetAdministrationShell CreateAssetAdministrationShell(IAssetAdministrationShell body);
         void DeleteAssetAdministrationShell(int packageIndex, IAssetAdministrationShell aas);
@@ -29,6 +32,7 @@ public interface IAdminShellPackageEnvironmentService
         void ReplaceSubmodelById(string submodelIdentifier, ISubmodel newSubmodel);
         List<ISubmodel> GetAllSubmodels(IReference reqSemanticId = null, string idShort = null);
         bool IsSubmodelPresent(string submodelIdentifier);
+        bool IsSubmodelPresent(string submodelIdentifier, out ISubmodel output, out int packageIndex);
         ISubmodel CreateSubmodel(ISubmodel newSubmodel, string aasIdentifier = null);
 
         #endregion
diff --git a/src/AasxServerStandardBib/Services/AdminShellPackageEnvironmentService.cs b/src/AasxServerStandardBib/Services/AdminShellPackageEnvironmentService.cs
index 17d2928c2..8e3eb5d7a 100644
--- a/src/AasxServerStandardBib/Services/AdminShellPackageEnvironmentService.cs
+++ b/src/AasxServerStandardBib/Services/AdminShellPackageEnvironmentService.cs
@@ -12,6 +12,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.IO.Packaging;
 using System.Linq;
 using System.Threading.Tasks;
 
@@ -48,6 +49,12 @@ private bool EmptyPackageAvailable(out int emptyPackageIndex)
 
             return false;
         }
+
+        public void setWrite(int packageIndex, bool status)
+        {
+            _packages[packageIndex].setWrite(status);
+        }
+
         #endregion
 
         #region AssetAdministrationShell
@@ -238,7 +245,7 @@ public bool IsSubmodelPresent(string submodelIdentifier)
             return IsSubmodelPresent(submodelIdentifier, out _, out _);
         }
 
-        private bool IsSubmodelPresent(string submodelIdentifier, out ISubmodel output, out int packageIndex)
+        public bool IsSubmodelPresent(string submodelIdentifier, out ISubmodel output, out int packageIndex)
         {
             output = null;
             packageIndex = -1;
@@ -255,6 +262,7 @@ private bool IsSubmodelPresent(string submodelIdentifier, out ISubmodel output,
                         var submodels = env.Submodels.Where(a => a.Id.Equals(submodelIdentifier));
                         if (submodels.Any())
                         {
+                            /*
                             if (!Program.withDb)
                             {
                                 output = submodels.First();
@@ -263,6 +271,8 @@ private bool IsSubmodelPresent(string submodelIdentifier, out ISubmodel output,
                             {
                                 output = DBRead.getSubmodel(submodelIdentifier);
                             }
+                            */
+                            output = submodels.First();
                             packageIndex = Array.IndexOf(_packages, package);
                             return true;
                         }
diff --git a/src/AasxServerStandardBib/Services/SubmodelService.cs b/src/AasxServerStandardBib/Services/SubmodelService.cs
index 98387f696..0cabee998 100644
--- a/src/AasxServerStandardBib/Services/SubmodelService.cs
+++ b/src/AasxServerStandardBib/Services/SubmodelService.cs
@@ -500,30 +500,39 @@ public ISubmodel CreateSubmodel(ISubmodel newSubmodel, string aasIdentifier)
 
         public void UpdateSubmodelById(string submodelIdentifier, ISubmodel newSubmodel)
         {
-            var submodel = _packageEnvService.GetSubmodelById(submodelIdentifier, out _);
-
-            //Verify the body first
-            _verificationService.VerifyRequestBody(newSubmodel);
+            int packageIndex = -1;
+            ISubmodel submodel = null;
+            if (_packageEnvService.IsSubmodelPresent(submodelIdentifier, out submodel, out packageIndex))
+            {
+                //Verify the body first
+                _verificationService.VerifyRequestBody(newSubmodel);
 
-            Update.ToUpdateObject(submodel, newSubmodel);
+                Update.ToUpdateObject(submodel, newSubmodel);
 
-            submodel.SetTimeStamp(DateTime.UtcNow);
+                submodel.SetTimeStamp(DateTime.UtcNow);
 
-            Program.signalNewData(0);
+                _packageEnvService.setWrite(packageIndex, true);
+                Program.signalNewData(1);
+            }
         }
 
         public void UpdateSubmodelElementByPath(string submodelIdentifier, string idShortPath, ISubmodelElement newSme)
         {
-            var submodelElement = GetSubmodelElementByPath(submodelIdentifier, idShortPath);
+            int packageIndex = -1;
+            if (_packageEnvService.IsSubmodelPresent(submodelIdentifier, out ISubmodel _, out packageIndex))
+            {
+                var submodelElement = GetSubmodelElementByPath(submodelIdentifier, idShortPath);
 
-            //Verify the body first
-            _verificationService.VerifyRequestBody(newSme);
+                //Verify the body first
+                _verificationService.VerifyRequestBody(newSme);
 
-            Update.ToUpdateObject(submodelElement, newSme);
+                Update.ToUpdateObject(submodelElement, newSme);
 
-            newSme.SetTimeStamp(DateTime.UtcNow);
+                submodelElement.SetTimeStamp(DateTime.UtcNow);
 
-            Program.signalNewData(0);
+                _packageEnvService.setWrite(packageIndex, true);
+                Program.signalNewData(1);
+            }
         }
 
         public void ReplaceFileByPath(string submodelIdentifier, string idShortPath, string fileName, string contentType, MemoryStream fileContent)