diff --git a/UnityMcpBridge/Editor/Tools/ManageAsset.cs b/UnityMcpBridge/Editor/Tools/ManageAsset.cs
index 59f31e7..70e3ff6 100644
--- a/UnityMcpBridge/Editor/Tools/ManageAsset.cs
+++ b/UnityMcpBridge/Editor/Tools/ManageAsset.cs
@@ -1279,21 +1279,24 @@ namespace MCPForUnity.Editor.Tools
                             rt = RenderTexture.GetTemporary(preview.width, preview.height);
                             Graphics.Blit(preview, rt);
                             RenderTexture.active = rt;
-                            readablePreview = new Texture2D(preview.width, preview.height);
+                            readablePreview = new Texture2D(preview.width, preview.height, TextureFormat.RGB24, false);
                             readablePreview.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0);
                             readablePreview.Apply();
+
+                            var pngData = readablePreview.EncodeToPNG();
+                            if (pngData != null && pngData.Length > 0)
+                            {
+                                previewBase64 = Convert.ToBase64String(pngData);
+                                previewWidth = readablePreview.width;
+                                previewHeight = readablePreview.height;
+                            }
                         }
                         finally
                         {
                             RenderTexture.active = previous;
                             if (rt != null) RenderTexture.ReleaseTemporary(rt);
+                            if (readablePreview != null) UnityEngine.Object.DestroyImmediate(readablePreview);
                         }
-
-                        var pngData = readablePreview.EncodeToPNG();
-                        previewBase64 = Convert.ToBase64String(pngData);
-                        previewWidth = readablePreview.width;
-                        previewHeight = readablePreview.height;
-                        UnityEngine.Object.DestroyImmediate(readablePreview);
                     }
                     catch (Exception ex)
                     {
diff --git a/UnityMcpBridge/UnityMcpServer~/src/tools/manage_script_edits.py b/UnityMcpBridge/UnityMcpServer~/src/tools/manage_script_edits.py
index 5101670..91a107b 100644
--- a/UnityMcpBridge/UnityMcpServer~/src/tools/manage_script_edits.py
+++ b/UnityMcpBridge/UnityMcpServer~/src/tools/manage_script_edits.py
@@ -42,7 +42,7 @@ def _apply_edits_locally(original_text: str, edits: List[Dict[str, Any]]) -> str
             flags = re.MULTILINE | (re.IGNORECASE if edit.get("ignore_case") else 0)
             
             # Find the best match using improved heuristics
-            match = _find_best_anchor_match(anchor, text, flags, edit.get("prefer_last", True))
+            match = _find_best_anchor_match(anchor, text, flags, bool(edit.get("prefer_last", True)))
             if not match:
                 if edit.get("allow_noop", True):
                     continue