diff --git a/dopt.DeltaBarth.Tests/PluginTest.cs b/dopt.DeltaBarth.Tests/PluginTest.cs
index 4090465..940cea9 100644
--- a/dopt.DeltaBarth.Tests/PluginTest.cs
+++ b/dopt.DeltaBarth.Tests/PluginTest.cs
@@ -47,14 +47,19 @@ namespace dopt.DeltaBarth.Tests
         {
             return base.GetBaseApiUrl();
         }
-        new public void SetzeBasisApiUrl(string basisApiUrl)
+        public new string GetDataPath()
         {
-            base.SetzeBasisApiUrl(basisApiUrl);
+            return base.GetDataPath();
+        }
+        public new void Setup(string datenPfad, string basisApiUrl)
+        {
+            base.Setup(datenPfad, basisApiUrl);
         }
     }
     [TestClass]
     public sealed class PluginTest
     {
+        private const string baseDataPath = @"A:\Arbeitsaufgaben\Delta-Barth\cs-wrapper\dopt.DeltaBarth\test_data_path";
         internal Config config = new Config();
         static void PrettyPrint(object toSerialise)
         {
@@ -85,13 +90,19 @@ namespace dopt.DeltaBarth.Tests
             test.Dispose();
         }
         [TestMethod]
-        public void Set_and_Obtain_BaseApiUrl_Test()
+        public void SetupSession_Test()
         {
             var test = new TPlugin();
             string apiUrlSet = "http://10.2.22.21:8080/api/";
-            test.SetzeBasisApiUrl(apiUrlSet);
+            test.Setup(baseDataPath, apiUrlSet);
+            // data path
+            var dataPathGet = test.GetDataPath();
+            Console.WriteLine($"Result for data path from Python session was: {dataPathGet}");
+            bool pathElementsContained = dataPathGet.Contains("test_data_path");
+            Assert.IsTrue(pathElementsContained);
+            // API URL
             var apiUrlGet = test.GetBaseApiUrl();
-            Console.WriteLine($"Result from Python session was: {apiUrlGet}");
+            Console.WriteLine($"Result for API URL from Python session was: {apiUrlGet}");
             Assert.AreEqual(apiUrlSet, apiUrlGet);
             test.Dispose();
         }
@@ -100,7 +111,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = "http://10.2.22.21:8080/api/", user = "user", password = "password", database = "DB1", mandant = "mandant1";
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var apiUrlGet = test.GetBaseApiUrl();
             var creds = test.GetCredentials();
             Console.WriteLine($"Result from Python session was: API-URL={apiUrlGet}, creds={creds}");
@@ -117,7 +128,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = "http://10.2.22.21:8080/api/", user = "user", password = "password", database = "DB1", mandant = "mandant1";
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var res = test.UmsatzprognoseDummy(null, null);
             PrettyPrint(res);
             test.Dispose();
@@ -127,7 +138,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = "http://10.2.22.21:8080/api/", user = "user", password = "password", database = "DB1", mandant = "mandant1";
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var comp_id = 1000;
             var res = test.UmsatzprognoseDummy(comp_id, null);
             PrettyPrint(res);
@@ -138,7 +149,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = "http://10.2.22.21:8080/api/", user = "user", password = "password", database = "DB1", mandant = "mandant1";
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var date = new DateTime(2023, 1, 1, 12, 45, 30);
             var res = test.UmsatzprognoseDummy(null, date);
             PrettyPrint(res);
@@ -151,7 +162,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var comp_id = 1024;
             var res = test.Umsatzprognose(comp_id, null);
             PrettyPrint(res);
@@ -163,7 +174,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var date = new DateTime(2030, 1, 1, 12, 45, 30);
             var res = test.Umsatzprognose(null, date);
             PrettyPrint(res);
@@ -175,7 +186,7 @@ namespace dopt.DeltaBarth.Tests
         {
             var test = new TPlugin();
             string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
-            test.Startup(apiUrlSet, user, password, database, mandant);
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
             var date = new DateTime(2015, 1, 1, 12, 45, 30);
             var res = test.Umsatzprognose(null, date);
             PrettyPrint(res);
diff --git a/dopt.DeltaBarth/Plugin.cs b/dopt.DeltaBarth/Plugin.cs
index 160b2b6..45312d0 100644
--- a/dopt.DeltaBarth/Plugin.cs
+++ b/dopt.DeltaBarth/Plugin.cs
@@ -16,17 +16,12 @@ namespace dopt.DeltaBarth
                 pyModPipeline = Py.Import("delta_barth.pipelines");
             }
         }
-        public void Startup(string basisApiUrl, string nutzername, string passwort, string datenbank, string mandant)
+        public void Startup(string datenPfad, string basisApiUrl, string nutzername, string passwort, string datenbank, string mandant)
         {
             AssertNotDisposed();
-            SetzeBasisApiUrl(basisApiUrl);
+            Setup(datenPfad, basisApiUrl);
             SetzeNutzerdaten(nutzername, passwort, datenbank, mandant);
         }
-        protected void SetzeBasisApiUrl(string basisApiUrl)
-        {
-            AssertNotDisposed();
-            pyModManagement.set_base_url(basisApiUrl);
-        }
         public void SetzeNutzerdaten(string nutzername, string passwort, string datenbank, string mandant)
         {
             AssertNotDisposed();
@@ -58,6 +53,14 @@ namespace dopt.DeltaBarth
 
             return parsed;
         }
+        protected void Setup(string datenPfad, string basisApiUrl)
+        {
+            AssertNotDisposed();
+            using (Py.GIL())
+            {
+                pyModManagement.setup(datenPfad, basisApiUrl);
+            }
+        }
         protected string GetBaseApiUrl()
         {
             AssertNotDisposed();
@@ -68,6 +71,16 @@ namespace dopt.DeltaBarth
             }
             return pyJson;
         }
+        protected string GetDataPath()
+        {
+            AssertNotDisposed();
+            string pyJson;
+            using (Py.GIL())
+            {
+                pyJson = (string)pyModManagement.get_data_path();
+            }
+            return pyJson;
+        }
         protected DataObjects.Credentials GetCredentials()
         {
             AssertNotDisposed();
diff --git a/dopt.DeltaBarth/dopt.DeltaBarth.csproj b/dopt.DeltaBarth/dopt.DeltaBarth.csproj
index 09e7d06..829f3bf 100644
--- a/dopt.DeltaBarth/dopt.DeltaBarth.csproj
+++ b/dopt.DeltaBarth/dopt.DeltaBarth.csproj
@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
     <PlatformTarget>x64</PlatformTarget>
     <Platforms>x64</Platforms>
-    <Version>0.2.0</Version>
+    <Version>0.3.0</Version>
   </PropertyGroup>
 
   <ItemGroup>