Update src/streamlit_app.py

src/streamlit_app.py

@@ -2519,6 +2519,8 @@ def parse_validation_master(xlsx_bytes: bytes) -> dict:
 
 def parse_po_master(xlsx_bytes: bytes) -> dict:
     """Parse PO Master Excel → purchase_orders (for validation) + matching_pos + po_lines_map."""
+    if not _pipeline_available:
+        raise RuntimeError(f"Pipeline not loaded — cannot parse PO master: {_pipeline_import_error}")
     df = pd.read_excel(BytesIO(xlsx_bytes)).fillna("")
     val_pos: dict = {}       # po_id → SimpleNamespace for validation layer
     match_pos: dict = {}     # po_id → POHeader for matching layer
@@ -2578,6 +2580,8 @@ def parse_po_master(xlsx_bytes: bytes) -> dict:
 
 def parse_gr_master(xlsx_bytes: bytes) -> dict:
     """Parse GR Master Excel → gr_rows list."""
+    if not _pipeline_available:
+        raise RuntimeError(f"Pipeline not loaded — cannot parse GR master: {_pipeline_import_error}")
     df = pd.read_excel(BytesIO(xlsx_bytes)).fillna("")
     gr_rows = []
     for _, row in df.iterrows():
@@ -2606,6 +2610,8 @@ def parse_gr_master(xlsx_bytes: bytes) -> dict:
 
 def parse_contract_master(xlsx_bytes: bytes) -> dict:
     """Parse Contract Master Excel → contracts list."""
+    if not _pipeline_available:
+        raise RuntimeError(f"Pipeline not loaded — cannot parse Contract master: {_pipeline_import_error}")
     df = pd.read_excel(BytesIO(xlsx_bytes)).fillna("")
 
     def _parse_date_col(val):