diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5d3db9b..c8c564f 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,4 @@
 {
     "iis.configDir": "",
     "specstory.cloudSync.enabled": "never"
-}
\ No newline at end of file
+}
diff --git a/bin/on_start.lsp b/bin/on_start.lsp
index 18480d9..bcf2579 100644
--- a/bin/on_start.lsp
+++ b/bin/on_start.lsp
@@ -63,6 +63,44 @@
       ;; DBLCLKEDIT deaktivieren (Block-Editor nicht bei Doppelklick oeffnen)
       (setvar "DBLCLKEDIT" 0)
 
+      ;; PyRx BRX-Plugin laden (benoetigt fuer PYLOAD-Befehl)
+      (if menu-pfad
+        (progn
+          (setq pyrx-pfad (strcat menu-pfad "/.venv/Lib/site-packages/pyrx"))
+          ;; BricsCAD-Version aus ACADVER ermitteln (z.B. "25.0.0.0" -> "25")
+          (setq acadver-str (getvar "ACADVER"))
+          (setq ver-punkt (vl-string-search "." acadver-str))
+          (setq ver-major (if ver-punkt
+            (substr acadver-str 1 ver-punkt)
+            "25"
+          ))
+          (setq brx-datei (strcat pyrx-pfad "/RxLoaderV" ver-major ".0.brx"))
+          (if (findfile brx-datei)
+            (progn
+              (arxload brx-datei)
+              (princ (strcat "\n[SSG_LIB] PyRx BRX geladen (V" ver-major "): " brx-datei))
+            )
+            (progn
+              (princ (strcat "\n[SSG_LIB] FEHLER: PyRx BRX nicht gefunden: " brx-datei))
+              (princ "\n[SSG_LIB] Versuche Fallback-Versionen...")
+              (foreach ver '("26" "25" "24")
+                (if (not (= ver ver-major))
+                  (progn
+                    (setq brx-fallback (strcat pyrx-pfad "/RxLoaderV" ver ".0.brx"))
+                    (if (findfile brx-fallback)
+                      (progn
+                        (arxload brx-fallback)
+                        (princ (strcat "\n[SSG_LIB] PyRx BRX Fallback geladen (V" ver "): " brx-fallback))
+                      )
+                    )
+                  )
+                )
+              )
+            )
+          )
+        )
+      )
+
       ;; Python-Module laden (PyRx)
       (if menu-pfad
         (foreach pymod '("eckrad" "kreisel" "dblclick" "omniflo" "omniflo_boegen" "omniflo_weichen")
diff --git a/lib/elemente/omniflo_boegen.py b/lib/elemente/omniflo_boegen.py
index 45d1ad9..1b1e415 100644
--- a/lib/elemente/omniflo_boegen.py
+++ b/lib/elemente/omniflo_boegen.py
@@ -6,8 +6,6 @@
 import wx
 
 import PyRx as Rx
-import PyDb as Db
-import PyEd as Ed
 
 from elemente.omniflo import (
     load_boegen,
diff --git a/requirements.txt b/requirements.txt
index 969f874..9409f5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,10 @@
 # Python-Abhaengigkeiten
 # Installieren mit: pip install -r requirements.txt
 
-# PyRx - Python fuer AutoCAD/BricsCAD (in-process API)
-cad-pyrx >= 1.2.0
+ezdxf==1.4.1
+pytest==9.0.2
 
-# Beispiel-Abhaengigkeiten – anpassen nach Bedarf:
-# pydantic >= 2.0.0
-# pytest >= 9.0.0
+# PyRx - BricsCAD Python API (liefert .brx Plugin-Dateien und Python-Wrapper)
+# WICHTIG: Benoetigt Python 3.12 (py -3.12 -m venv)
+cad-pyrx >= 2.0.0
+wxpython >= 4.2.0