diff --git a/dfm_tools/xugrid_helpers.py b/dfm_tools/xugrid_helpers.py
index f05276c1..507972de 100644
--- a/dfm_tools/xugrid_helpers.py
+++ b/dfm_tools/xugrid_helpers.py
@@ -33,10 +33,7 @@ def get_vertical_dimensions(uds): #TODO: maybe add layer_dimension and interface
     processing MB_02_0*_map.nc
         >> found layer/interface dimensions in file: mesh2d_nLayers mesh2d_nInterfaces
     """
-    
-    if not isinstance(uds,(xr.Dataset,xu.UgridDataset)):
-        raise TypeError(f'uds should be of type xr.Dataset or xu.UgridDataset, but is {type(uds)}')
-    
+        
     if not hasattr(uds,'grid'): #early return in case of e.g. hisfile
         return None, None
         
diff --git a/tests/test_xugrid_helpers.py b/tests/test_xugrid_helpers.py
index aede2206..78ac27a5 100644
--- a/tests/test_xugrid_helpers.py
+++ b/tests/test_xugrid_helpers.py
@@ -197,11 +197,6 @@ def test_get_vertical_dimensions():
     assert dimn_layer is None
     assert dimn_interface is None
 
-    # incorrect type
-    with pytest.raises(TypeError) as e:
-        get_vertical_dimensions(1)
-    assert 'uds should be of type xr.Dataset or xu.UgridDataset' in str(e.value)
-
 
 @pytest.mark.systemtest
 def test_uda_edges_to_faces_interfaces_to_centers():