diff --git a/src/ewoc_dag/cli_dem.py b/src/ewoc_dag/cli_dem.py
index 2bb9e07..9d41344 100644
--- a/src/ewoc_dag/cli_dem.py
+++ b/src/ewoc_dag/cli_dem.py
@@ -50,7 +50,7 @@ def get_dem_data(
                 resolution=dem_resolution, to_sen2cor=to_sen2cor
         )
     else:
-        raise ValueError
+        raise ValueError("DEM type different than srtm, copdem is not possible!")
 
 
 # ---- CLI ----
diff --git a/src/ewoc_dag/eo_prd_id/s1_prd_id.py b/src/ewoc_dag/eo_prd_id/s1_prd_id.py
index 05c7c73..9dbed1f 100644
--- a/src/ewoc_dag/eo_prd_id/s1_prd_id.py
+++ b/src/ewoc_dag/eo_prd_id/s1_prd_id.py
@@ -153,7 +153,7 @@ def beam_mode(self):
 
     @beam_mode.setter
     def beam_mode(self, value):
-        allowed_values = ['IW', 'EW', 'WV']
+        allowed_values = ['SM', 'IW', 'EW', 'WV']
         if value in allowed_values:
             self._beam_mode = value
         else:
diff --git a/src/ewoc_dag/eodag_utils.py b/src/ewoc_dag/eodag_utils.py
index 94f8b68..1127488 100644
--- a/src/ewoc_dag/eodag_utils.py
+++ b/src/ewoc_dag/eodag_utils.py
@@ -37,7 +37,7 @@ def get_product_by_id(
         products, _ = dag.search(id=product_id, provider=provider)
     if not products:
         logging.error("No results return by eodag!")
-        raise ValueError
+        raise ValueError("No results return by eodag!")
     out_prd_path = dag.download(products[0], outputs_prefix=out_dir)
     # delete zip file
     list_out = os.listdir(out_dir)