diff --git a/desktop_env/evaluators/metrics/table.py b/desktop_env/evaluators/metrics/table.py
index b52a533..e3dc881 100644
--- a/desktop_env/evaluators/metrics/table.py
+++ b/desktop_env/evaluators/metrics/table.py
@@ -33,16 +33,25 @@ def _parse_sheet_idx(sheet_idx: Union[int, str]
                      ) -> Tuple[BOOK, str]:
     #  function _parse_sheet_idx {{{ # 
     if isinstance(sheet_idx, int):
-        index: str = result_sheet_names[sheet_idx]
+        try:
+            index: str = result_sheet_names[sheet_idx]
+        except:
+            index = ""
         book: BOOK = result
     elif sheet_idx.startswith("RI"):
-        index: str = result_sheet_names[int(sheet_idx[2:])]
+        try:
+            index: str = result_sheet_names[int(sheet_idx[2:])]
+        except:
+            index = ""
         book: BOOK = result
     elif sheet_idx.startswith("RN"):
         index: str = sheet_idx[2:]
         book: BOOK = result
     elif sheet_idx.startswith("EI"):
-        index: str = expected_sheet_names[int(sheet_idx[2:])]
+        try:
+            index: str = expected_sheet_names[int(sheet_idx[2:])]
+        except:
+            index = ""
         book: BOOK = expected
     elif sheet_idx.startswith("EN"):
         index: str = sheet_idx[2:]