maybe finally fix for weights

perception_roi_server.py

@@ -59,26 +59,48 @@ def root():
 _model_lock = threading.Lock()
 _models: Dict[str, YOLO] = {}
 
-def _resolve_weights_path(weights: str) -> str:
+def _resolve_weights_path(weights: str) -> (str, List[str]):
     if not weights:
-        return DEFAULT_WEIGHTS
-    w = str(weights)
-    if os.path.isabs(w) or os.path.exists(w):
-        return w
-    # Try configured weights dir first
+        return DEFAULT_WEIGHTS, []
+    w = str(weights).strip()
+    if not w:
+        return DEFAULT_WEIGHTS, []
+    if os.path.isabs(w) and os.path.exists(w):
+        return os.path.abspath(w), [os.path.abspath(w)]
+    if os.path.exists(w):
+        return os.path.abspath(w), [os.path.abspath(w)]
+    search_dirs: List[str] = []
     if WEIGHTS_DIR:
-        cand = os.path.join(WEIGHTS_DIR, w)
-        if os.path.exists(cand):
-            return cand
-    # Try common local directories
-    for base in (os.getcwd(), os.path.dirname(__file__), DATA_DIR, "/app", "/workspace", "/data"):
+        search_dirs.append(WEIGHTS_DIR)
+    search_dirs.extend([
+        os.getcwd(),
+        os.path.dirname(__file__),
+        os.path.abspath(os.path.dirname(__file__)),
+        os.path.abspath(os.path.join(os.path.dirname(__file__), "..")),
+        DATA_DIR,
+        "/home/user/app",
+        "/app",
+        "/workspace",
+        "/data",
+    ])
+    checked: List[str] = []
+    for base in search_dirs:
+        if not base:
+            continue
         cand = os.path.join(base, w)
+        checked.append(cand)
         if os.path.exists(cand):
-            return cand
-    return w
+            return os.path.abspath(cand), checked
+    return w, checked
 
 def get_model(weights: str) -> YOLO:
-    key = _resolve_weights_path(weights or DEFAULT_WEIGHTS)
+    key, checked = _resolve_weights_path(weights or DEFAULT_WEIGHTS)
+    if str(key).endswith(".pt") and not os.path.exists(key):
+        search_list = ", ".join(checked) if checked else "(no local paths searched)"
+        raise RuntimeError(
+            f"Weights not found locally: {weights}. Searched: {search_list}. "
+            f"Set WEIGHTS_DIR or upload the weights to the app directory."
+        )
     with _model_lock:
         if key not in _models:
             _models[key] = YOLO(key)