added another check

src/ptbench/engine/trainer.py

@@ -92,9 +92,12 @@ def initialize_lowest_validation_loss(logfile_name, arguments):
             # Get the values of the desired column as a list
             values = [float(row[column_name]) for row in reader]
 
+            if not values:
+                return sys.float_info.max
+
         lowest_value = min(values)
         logger.info(
-            f"Found lowest validation error from previous session: {lowest_value}"
+            f"Found lowest validation loss from previous session: {lowest_value}"
         )
         return lowest_value
 

tests/test_cli.py

@@ -288,7 +288,8 @@ def test_train_pasa_montgomery_from_checkpoint(temporary_basedir):
             r"^Continuing from epoch 1$": 1,
             r"^Saving model summary at.*$": 1,
             r"^Model has.*$": 1,
-            r"^Saving checkpoint": 2,
+            r"^Found lowest validation loss from previous session.*$": 1,
+            r"^Saving checkpoint": 1,
             r"^Total training time:": 1,
             r"^Z-normalization with mean": 1,
         }