added file not found warnings

Author: larsbuntemeyer

pyremo/preproc/preprocessor.py

@@ -353,6 +353,8 @@ def preprocess(self, date=None, ds=None, outpath=None, initial=None, **kwargs):
         """
         if ds is None:
             ds = self.get_input_dataset(date=date, initial=initial)
+            if ds is None:
+                warn(f"No input dataset available for date {date}")
         ads = self.remap(
             ds,
             domain_info=self.domain_info,
@@ -587,6 +589,9 @@ def get_input_dataset(self, date, initial=False):
             Input dataset.
         """
         filename = self.get_filename(date)
+        if not os.path.isfile(filename):
+            warn(f"Expected input file not found: {filename}")
+            return None
         return self.open_remo_dataset(filename)