diff --git a/Tools/ModelTranslator/rizom_unwrap.py b/Tools/ModelTranslator/rizom_unwrap.py
index 5326851e..8bcdcf14 100644
--- a/Tools/ModelTranslator/rizom_unwrap.py
+++ b/Tools/ModelTranslator/rizom_unwrap.py
@@ -91,6 +91,13 @@ def _call(label, fn, params, timeout=TIMEOUT_S):
     return res
 
 
+def _check_pack_result(res):
+    """Pack 返回 Coverages 空列表 = 没有任何平面岛可打包——Unfold 未生效。
+    实测这是 RizomUV 无有效授权时的静默失败形态（命令全部"成功"但解算不执行）。"""
+    if isinstance(res, dict) and "Coverages" in res and not res["Coverages"]:
+        raise RizomError("Pack 无任何平面岛（Unfold 未生效）——请检查 RizomUV 授权是否已激活")
+
+
 RETRY = 1   # 实例级重试次数：RizomUV IPC 有 2000ms 内部响应窗，偶发 not responding
 
 
@@ -137,13 +144,15 @@ def _unwrap_once(mod, exe, fbx_abs, map_res, pad_uv):
                 "Quality": 0.5,
             }})
         _call("Cut", link.Cut, {"PrimType": "Edge", "WorkingSet": "Visible"})
-        _call("Unfold", link.Unfold, {"PrimType": "Edge", "WorkingSet": "Visible",
-                                      "BorderIntersections": True,
-                                      "TriangleFlips": True})
+        r = _call("Unfold", link.Unfold, {"PrimType": "Edge", "WorkingSet": "Visible",
+                                          "BorderIntersections": True,
+                                          "TriangleFlips": True})
+        if isinstance(r, dict) and r.get("BijectionFailedIslandIDs"):
+            print("[警告] Unfold 有 %d 个岛双射失败" % len(r["BijectionFailedIslandIDs"]))
         # Scaling.Mode=3 (AVG_RATIO_OF_GROUP)：官方文档建议首次展开后用该模式统一密度。
         # 注：pyd docstring 写的 Global 包装层已被 2025 应用侧拒绝（exe 内 Pack schema
         # 无 Global，打包属性直接为顶层参数），故扁平传参。
-        _call("Pack", link.Pack, {
+        r = _call("Pack", link.Pack, {
             "RootGroup": "RootGroup", "WorkingSet": "Visible",
             "ProcessTileSelection": False, "RecursionDepth": 1,
             "Translate": True,
@@ -151,6 +160,7 @@ def _unwrap_once(mod, exe, fbx_abs, map_res, pad_uv):
             "PaddingSize": pad_uv, "MarginSize": pad_uv,
             "Rotate": {"Step": 90.0},
             "Scaling": {"Mode": 3}})
+        _check_pack_result(r)
         _call("Save", link.Save, {"File.Path": fbx_abs})
     finally:
         try:
diff --git a/Tools/ModelTranslator/tests/test_rizom_unwrap.py b/Tools/ModelTranslator/tests/test_rizom_unwrap.py
index a8443965..d3769b97 100644
--- a/Tools/ModelTranslator/tests/test_rizom_unwrap.py
+++ b/Tools/ModelTranslator/tests/test_rizom_unwrap.py
@@ -72,5 +72,18 @@ class TestRetry(unittest.TestCase):
             ru.rizom_unwrap("x.fbx", "rizomuv.exe")
 
 
+class TestPackCoverageGuard(unittest.TestCase):
+    def test_empty_coverages_raises(self):
+        with self.assertRaises(ru.RizomError) as cm:
+            ru._check_pack_result({"Coverages": []})
+        self.assertIn("授权", str(cm.exception))
+
+    def test_normal_coverages_pass(self):
+        ru._check_pack_result({"Coverages": [0.72]})   # 不抛
+
+    def test_none_result_passes(self):
+        ru._check_pack_result(None)   # 老版本无返回信息时不误伤
+
+
 if __name__ == "__main__":
     unittest.main()