diff --git a/benchmark/dbally_benchmark/e2e_benchmark.py b/benchmark/dbally_benchmark/e2e_benchmark.py
index 6ea01c36..da20857d 100644
--- a/benchmark/dbally_benchmark/e2e_benchmark.py
+++ b/benchmark/dbally_benchmark/e2e_benchmark.py
@@ -21,7 +21,7 @@
 from sqlalchemy import create_engine
 
 import dbally
-from dbally._collection import Collection
+from dbally.collection import Collection
 from dbally.data_models.prompts.iql_prompt_template import default_iql_template
 from dbally.data_models.prompts.view_selector_prompt_template import default_view_selector_template
 from dbally.utils.errors import NoViewFoundError, UnsupportedQueryError
diff --git a/docs/reference/collection.md b/docs/reference/collection.md
index 1a0cdd44..85a0b75c 100644
--- a/docs/reference/collection.md
+++ b/docs/reference/collection.md
@@ -5,4 +5,6 @@
 
 ::: dbally.Collection
 
-::: dbally.data_models.execution_result.ExecutionResult
\ No newline at end of file
+::: dbally.data_models.execution_result.ExecutionResult
+
+::: dbally.collection.IndexUpdateError
\ No newline at end of file
diff --git a/src/dbally/__init__.py b/src/dbally/__init__.py
index 8c773013..d8c4a9b4 100644
--- a/src/dbally/__init__.py
+++ b/src/dbally/__init__.py
@@ -8,8 +8,8 @@
 from dbally.views.sqlalchemy_base import SqlAlchemyBaseView
 
 from .__version__ import __version__
-from ._collection import Collection
 from ._main import create_collection, use_event_handler, use_openai_llm
+from .collection import Collection
 
 __all__ = [
     "__version__",
diff --git a/src/dbally/_main.py b/src/dbally/_main.py
index b32fb88b..c54ece2d 100644
--- a/src/dbally/_main.py
+++ b/src/dbally/_main.py
@@ -1,7 +1,7 @@
 from typing import List, Optional
 
-from ._collection import Collection
 from .audit.event_handlers.base import EventHandler
+from .collection import Collection
 from .iql_generator.iql_generator import IQLGenerator
 from .llm_client.base import LLMClient
 from .llm_client.openai_client import OpenAIClient
diff --git a/src/dbally/assistants/openai.py b/src/dbally/assistants/openai.py
index e9555402..4f715787 100644
--- a/src/dbally/assistants/openai.py
+++ b/src/dbally/assistants/openai.py
@@ -4,8 +4,8 @@
 
 from openai.types.beta.threads import RequiredActionFunctionToolCall
 
-from dbally._collection import Collection
 from dbally.assistants.base import AssistantAdapter, FunctionCallingError, FunctionCallState
+from dbally.collection import Collection
 from dbally.utils.errors import UnsupportedQueryError
 
 _DBALLY_INFO = "Dbally has access to the following database views: "
diff --git a/src/dbally/_collection.py b/src/dbally/collection.py
similarity index 87%
rename from src/dbally/_collection.py
rename to src/dbally/collection.py
index 153c97b8..c36be374 100644
--- a/src/dbally/_collection.py
+++ b/src/dbally/collection.py
@@ -18,6 +18,23 @@
 from dbally.views.base import AbstractBaseView
 
 
+class IndexUpdateError(Exception):
+    """
+    Exception for when updating any of the Collection's similarity indexes fails.
+
+    Provides a dictionary mapping failed indexes to their
+    respective exceptions as the `failed_indexes` attribute.
+    """
+
+    def __init__(self, message: str, failed_indexes: Dict[AbstractSimilarityIndex, Exception]) -> None:
+        """
+        Args:
+            failed_indexes: Dictionary mapping failed indexes to their respective exceptions.
+        """
+        self.failed_indexes = failed_indexes
+        super().__init__(message)
+
+
 class Collection:
     """
     Collection is a container for a set of views that can be used by db-ally to answer user questions.
@@ -250,7 +267,21 @@ def get_similarity_indexes(self) -> Dict[AbstractSimilarityIndex, List[Tuple[str
     async def update_similarity_indexes(self) -> None:
         """
         Update all similarity indexes from all views in the collection.
+
+        Raises:
+            IndexUpdateError: if updating any of the indexes fails. The exception provides `failed_indexes` attribute,
+                a dictionary mapping failed indexes to their respective exceptions. Indexes not present in
+                the dictionary were updated successfully.
         """
         indexes = self.get_similarity_indexes()
         update_corutines = [index.update() for index in indexes]
-        await asyncio.gather(*update_corutines)
+        results = await asyncio.gather(*update_corutines, return_exceptions=True)
+        failed_indexes = {
+            index: exception for index, exception in zip(indexes, results) if isinstance(exception, Exception)
+        }
+        if failed_indexes:
+            failed_locations = [loc for index in failed_indexes for loc in indexes[index]]
+            description = ", ".join(
+                f"{view_name}.{method_name}.{param_name}" for view_name, method_name, param_name in failed_locations
+            )
+            raise IndexUpdateError(f"Failed to update similarity indexes for {description}", failed_indexes)
diff --git a/tests/unit/similarity/test_detector.py b/tests/unit/similarity/test_detector.py
index 39f093b1..5c5a406c 100644
--- a/tests/unit/similarity/test_detector.py
+++ b/tests/unit/similarity/test_detector.py
@@ -78,7 +78,7 @@ def test_detector_with_module_not_found():
     """
     with pytest.raises(SimilarityIndexDetectorException) as exc:
         SimilarityIndexDetector.from_path("not_found")
-        assert exc.value.message == "Module not_found not found."
+    assert exc.value.message == "Module not_found not found."
 
 
 def test_detector_with_empty_module():
@@ -97,7 +97,7 @@ def test_detector_with_view_not_found():
     detector = SimilarityIndexDetector.from_path("sample_module.submodule:NotFoundView")
     with pytest.raises(SimilarityIndexDetectorException) as exc:
         detector.list_views()
-        assert exc.value.message == "View NotFoundView not found."
+    assert exc.value.message == "View NotFoundView not found in module sample_module.submodule."
 
 
 def test_detector_with_method_not_found():
@@ -107,7 +107,7 @@ def test_detector_with_method_not_found():
     detector = SimilarityIndexDetector.from_path("sample_module.submodule:FooView.not_found")
     with pytest.raises(SimilarityIndexDetectorException) as exc:
         detector.list_indexes()
-        assert exc.value.message == "Filter method not_found not found in view FooView."
+    assert exc.value.message == "Filter method not_found not found in view FooView."
 
 
 def test_detector_with_argument_not_found():
@@ -117,4 +117,4 @@ def test_detector_with_argument_not_found():
     detector = SimilarityIndexDetector.from_path("sample_module.submodule:FooView.method_bar.not_found")
     with pytest.raises(SimilarityIndexDetectorException) as exc:
         detector.list_indexes()
-        assert exc.value.message == "Argument not_found not found in method FooView.method_bar."
+    assert exc.value.message == "Argument not_found not found in method method_bar."
diff --git a/tests/unit/test_collection.py b/tests/unit/test_collection.py
index 034f7250..e8b6639f 100644
--- a/tests/unit/test_collection.py
+++ b/tests/unit/test_collection.py
@@ -6,7 +6,7 @@
 import pytest
 from typing_extensions import Annotated
 
-from dbally._collection import Collection
+from dbally.collection import Collection, IndexUpdateError
 from dbally.iql._exceptions import IQLError
 from dbally.utils.errors import NoViewFoundError
 from dbally.views.base import ExposedFunction, MethodParamWithTyping, ViewExecutionResult
@@ -280,7 +280,7 @@ async def test_ask_feedback_loop(collection_feedback: Collection) -> None:
         ValueError("err3"),
         ValueError("err4"),
     ]
-    with patch("dbally._collection.IQLQuery.parse") as mock_iql_query:
+    with patch("dbally.collection.IQLQuery.parse") as mock_iql_query:
         mock_iql_query.side_effect = errors
 
         await collection_feedback.ask("Mock question")
@@ -406,3 +406,34 @@ async def test_update_similarity_indexes(
     await collection.update_similarity_indexes()
     assert foo_index.update_count == 1
     assert bar_index.update_count == 1
+
+
+async def test_update_similarity_indexes_error(
+    similarity_classes: Tuple[MockSimilarityIndex, MockSimilarityIndex, Type[MockViewBase], Type[MockViewBase]],
+    collection: Collection,
+) -> None:
+    """
+    Tests that the update_similarity_indexes method does not raise an exception when the update method of the similarity
+    indexes raises an exception
+    """
+    (
+        foo_index,
+        bar_index,
+        MockViewWithSimilarity,  # pylint: disable=invalid-name
+        MockViewWithSimilarity2,  # pylint: disable=invalid-name
+    ) = similarity_classes
+    collection.add(MockViewWithSimilarity)
+    collection.add(MockViewWithSimilarity2)
+
+    foo_exception = ValueError("foo")
+    foo_index.update = AsyncMock(side_effect=foo_exception)  # type: ignore
+    with pytest.raises(IndexUpdateError) as e:
+        await collection.update_similarity_indexes()
+    assert (
+        str(e.value) == "Failed to update similarity indexes for MockViewWithSimilarity.test_filter.dog, "
+        "MockViewWithSimilarity2.test_filter.monkey"
+    )
+    assert e.value.failed_indexes == {
+        foo_index: foo_exception,
+    }
+    assert bar_index.update_count == 1