diff --git a/tests/test_routines.py b/tests/test_routines.py
index df53695..17e1226 100644
--- a/tests/test_routines.py
+++ b/tests/test_routines.py
@@ -1,6 +1,6 @@
 import numpy as np
 import pytest
-from xdas.core.routines import Bag, SplitError
+from xdas.core.routines import Bag, CompatibilityError
 from xdas.core.dataarray import DataArray
 from xdas.core.coordinates import Coordinates
 
@@ -49,7 +49,7 @@ def test_bag_append_incompatible_dims(self):
         da2 = DataArray(np.random.rand(10, 5), dims=("space", "time"))
         bag = Bag(dim="time")
         bag.append(da1)
-        with pytest.raises(SplitError):
+        with pytest.raises(CompatibilityError):
             bag.append(da2)
 
     def test_bag_append_incompatible_shape(self):
@@ -57,7 +57,7 @@ def test_bag_append_incompatible_shape(self):
         da2 = DataArray(np.random.rand(10, 6), dims=("time", "space"))
         bag = Bag(dim="time")
         bag.append(da1)
-        with pytest.raises(SplitError):
+        with pytest.raises(CompatibilityError):
             bag.append(da2)
 
     def test_bag_append_incompatible_dtype(self):
@@ -65,7 +65,7 @@ def test_bag_append_incompatible_dtype(self):
         da2 = DataArray(np.random.randint(0, 10, size=(10, 5)), dims=("time", "space"))
         bag = Bag(dim="time")
         bag.append(da1)
-        with pytest.raises(SplitError):
+        with pytest.raises(CompatibilityError):
             bag.append(da2)
 
     def test_bag_append_incompatible_coords(self):
@@ -81,7 +81,7 @@ def test_bag_append_incompatible_coords(self):
         )
         bag = Bag(dim="time")
         bag.append(da1)
-        with pytest.raises(SplitError):
+        with pytest.raises(CompatibilityError):
             bag.append(da2)
 
     def test_bag_append_incompatible_sampling_interval(self):
@@ -97,5 +97,5 @@ def test_bag_append_incompatible_sampling_interval(self):
         )
         bag = Bag(dim="time")
         bag.append(da1)
-        with pytest.raises(SplitError):
+        with pytest.raises(CompatibilityError):
             bag.append(da2)
diff --git a/xdas/core/routines.py b/xdas/core/routines.py
index 861f792..cc0f1e4 100644
--- a/xdas/core/routines.py
+++ b/xdas/core/routines.py
@@ -520,7 +520,7 @@ def combine_by_coords(
     for da in objs:
         try:
             bag.append(da)
-        except SplitError:
+        except CompatibilityError:
             bags.append(bag)
             bag = Bag(dim)
             bag.append(da)
@@ -537,7 +537,7 @@ def combine_by_coords(
         return collection
 
 
-class SplitError(Exception):
+class CompatibilityError(Exception):
     """Custom exception to signal required splitting."""
 
     def __init__(self, message):
@@ -582,16 +582,16 @@ def append(self, da):
 
     def check_dims(self, da):
         if not self.dims == da.dims:
-            raise SplitError("dimensions are not compatible")
+            raise CompatibilityError("dimensions are not compatible")
 
     def check_shape(self, da):
         subshape = tuple(size for dim, size in da.sizes.items() if not dim == self.dim)
         if not self.subshape == subshape:
-            raise SplitError("shapes are not compatible")
+            raise CompatibilityError("shapes are not compatible")
 
     def check_dtype(self, da):
         if not self.dtype == da.dtype:
-            raise SplitError("data types are not compatible")
+            raise CompatibilityError("data types are not compatible")
 
     def check_coords(self, da):
         subcoords = (
@@ -600,7 +600,7 @@ def check_coords(self, da):
             else da.coords.drop_coords(self.dim)
         )
         if not self.subcoords.equals(subcoords):
-            raise SplitError("coordinates are not compatible")
+            raise CompatibilityError("coordinates are not compatible")
 
     def check_sampling_interval(self, da):
         if self.delta is None:
@@ -608,7 +608,7 @@ def check_sampling_interval(self, da):
         else:
             delta = get_sampling_interval(da, self.dim)
             if not np.isclose(delta, self.delta):
-                raise SplitError("sampling intervals are not compatible")
+                raise CompatibilityError("sampling intervals are not compatible")
 
 
 def concatenate(objs, dim="first", tolerance=None, virtual=None, verbose=None):