diff --git a/Gir_GstEditingServices.toml b/Gir_GstEditingServices.toml
index 8526c2a95..266bc1fa1 100644
--- a/Gir_GstEditingServices.toml
+++ b/Gir_GstEditingServices.toml
@@ -41,12 +41,10 @@ generate = [
     "GES.Edge",
     "GES.Effect",
     "GES.TrackType",
-    "GES.Pipeline",
     "GES.BaseEffect",
     "GES.TimelineElement",
     "GES.Group",
     "GES.TrackElement",
-    "GES.Track",
     "GES.Layer",
     "GES.Clip",
     "GES.UriClip",
@@ -95,6 +93,32 @@ status = "generate"
         [object.function.return]
         nullable = false
 
+    [[object.function]]
+    name = "load_from_uri"
+        [object.function.return]
+        bool_return_is_error = "Failed to load from uri"
+
+    [[object.function]]
+    name = "add_layer"
+        [object.function.return]
+        bool_return_is_error = "Failed to add layer"
+
+    [[object.function]]
+    name = "remove_layer"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove layer"
+
+    [[object.function]]
+    name = "add_track"
+        [object.function.return]
+        bool_return_is_error = "Failed to add track"
+
+    [[object.function]]
+    name = "move_layer"
+        [object.function.return]
+        bool_return_is_error = "Failed to move layer"
+
+
 [[object]]
 name = "GES.Container"
 status = "generate"
@@ -106,5 +130,43 @@ trait_name = "GESContainerExt"
 
     [[object.function]]
     name = "remove"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove element"
+
+    [[object.function]]
+    name = "edit"
+        [object.function.return]
+        bool_return_is_error = "Failed to edit container"
+
+[[object]]
+name = "GES.Pipeline"
+status = "generate"
+trait_name = "PipelineExt"
+    [[object.function]]
+    name = "set_render_settings"
+        [object.function.return]
+        bool_return_is_error = "Failed to set render settings"
+
+    [[object.function]]
+    name = "set_mode"
+        [object.function.return]
+        bool_return_is_error = "Failed to set mode"
+
+    [[object.function]]
+    name = "save_thumbnail"
+        [object.function.return]
+        bool_return_is_error = "Failed to save thumbnail"
+
+[[object]]
+name = "GES.Track"
+status = "generate"
+trait_name = "TrackExt"
+    [[object.function]]
+    name = "add_element"
+        [object.function.return]
+        bool_return_is_error = "Failed to add element"
+
+    [[object.function]]
+    name = "remove_element"
         [object.function.return]
         bool_return_is_error = "Failed to remove element"
\ No newline at end of file
diff --git a/gstreamer-editing-services/src/auto/container.rs b/gstreamer-editing-services/src/auto/container.rs
index ed925bdf9..2329747a9 100644
--- a/gstreamer-editing-services/src/auto/container.rs
+++ b/gstreamer-editing-services/src/auto/container.rs
@@ -43,7 +43,7 @@ impl Container {
 pub trait GESContainerExt {
     fn add<P: IsA<TimelineElement>>(&self, child: &P) -> Result<(), glib::error::BoolError>;
 
-    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> bool;
+    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> Result<(), glib::error::BoolError>;
 
     fn get_children(&self, recursive: bool) -> Vec<TimelineElement>;
 
@@ -67,9 +67,9 @@ impl<O: IsA<Container> + IsA<glib::object::Object>> GESContainerExt for O {
         }
     }
 
-    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> bool {
+    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_container_edit(self.to_glib_none().0, layers.to_glib_none().0, new_layer_priority, mode.to_glib(), edge.to_glib(), position))
+            glib::error::BoolError::from_glib(ffi::ges_container_edit(self.to_glib_none().0, layers.to_glib_none().0, new_layer_priority, mode.to_glib(), edge.to_glib(), position), "Failed to edit container")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/pipeline.rs b/gstreamer-editing-services/src/auto/pipeline.rs
index f1b1417bc..aa8ede30d 100644
--- a/gstreamer-editing-services/src/auto/pipeline.rs
+++ b/gstreamer-editing-services/src/auto/pipeline.rs
@@ -68,9 +68,9 @@ pub trait PipelineExt {
 
     fn save_thumbnail(&self, width: i32, height: i32, format: &str, location: &str) -> Result<(), Error>;
 
-    fn set_mode(&self, mode: PipelineFlags) -> bool;
+    fn set_mode(&self, mode: PipelineFlags) -> Result<(), glib::error::BoolError>;
 
-    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> bool;
+    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> Result<(), glib::error::BoolError>;
 
     fn set_timeline(&self, timeline: &Timeline) -> bool;
 
@@ -156,15 +156,15 @@ impl<O: IsA<Pipeline> + IsA<glib::object::Object>> PipelineExt for O {
         }
     }
 
-    fn set_mode(&self, mode: PipelineFlags) -> bool {
+    fn set_mode(&self, mode: PipelineFlags) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_pipeline_set_mode(self.to_glib_none().0, mode.to_glib()))
+            glib::error::BoolError::from_glib(ffi::ges_pipeline_set_mode(self.to_glib_none().0, mode.to_glib()), "Failed to set mode")
         }
     }
 
-    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> bool {
+    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_pipeline_set_render_settings(self.to_glib_none().0, output_uri.to_glib_none().0, profile.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::ges_pipeline_set_render_settings(self.to_glib_none().0, output_uri.to_glib_none().0, profile.to_glib_none().0), "Failed to set render settings")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/timeline.rs b/gstreamer-editing-services/src/auto/timeline.rs
index 86e2f2926..2d016c936 100644
--- a/gstreamer-editing-services/src/auto/timeline.rs
+++ b/gstreamer-editing-services/src/auto/timeline.rs
@@ -70,9 +70,9 @@ impl Default for Timeline {
 }
 
 pub trait TimelineExt {
-    fn add_layer(&self, layer: &Layer) -> bool;
+    fn add_layer(&self, layer: &Layer) -> Result<(), glib::error::BoolError>;
 
-    fn add_track<P: IsA<Track>>(&self, track: &P) -> bool;
+    fn add_track<P: IsA<Track>>(&self, track: &P) -> Result<(), glib::error::BoolError>;
 
     fn append_layer(&self) -> Layer;
 
@@ -104,11 +104,11 @@ pub trait TimelineExt {
 
     fn load_from_uri(&self, uri: &str) -> Result<(), Error>;
 
-    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> bool;
+    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> Result<(), glib::error::BoolError>;
 
     fn paste_element<P: IsA<TimelineElement>>(&self, element: &P, position: gst::ClockTime, layer_priority: i32) -> Option<TimelineElement>;
 
-    fn remove_layer(&self, layer: &Layer) -> bool;
+    fn remove_layer(&self, layer: &Layer) -> Result<(), glib::error::BoolError>;
 
     fn remove_track<P: IsA<Track>>(&self, track: &P) -> bool;
 
@@ -146,15 +146,15 @@ pub trait TimelineExt {
 }
 
 impl<O: IsA<Timeline> + IsA<glib::object::Object>> TimelineExt for O {
-    fn add_layer(&self, layer: &Layer) -> bool {
+    fn add_layer(&self, layer: &Layer) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_add_layer(self.to_glib_none().0, layer.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::ges_timeline_add_layer(self.to_glib_none().0, layer.to_glib_none().0), "Failed to add layer")
         }
     }
 
-    fn add_track<P: IsA<Track>>(&self, track: &P) -> bool {
+    fn add_track<P: IsA<Track>>(&self, track: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_add_track(self.to_glib_none().0, track.to_glib_full()))
+            glib::error::BoolError::from_glib(ffi::ges_timeline_add_track(self.to_glib_none().0, track.to_glib_full()), "Failed to add track")
         }
     }
 
@@ -250,9 +250,9 @@ impl<O: IsA<Timeline> + IsA<glib::object::Object>> TimelineExt for O {
         }
     }
 
-    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> bool {
+    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_move_layer(self.to_glib_none().0, layer.to_glib_none().0, new_layer_priority))
+            glib::error::BoolError::from_glib(ffi::ges_timeline_move_layer(self.to_glib_none().0, layer.to_glib_none().0, new_layer_priority), "Failed to move layer")
         }
     }
 
@@ -262,9 +262,9 @@ impl<O: IsA<Timeline> + IsA<glib::object::Object>> TimelineExt for O {
         }
     }
 
-    fn remove_layer(&self, layer: &Layer) -> bool {
+    fn remove_layer(&self, layer: &Layer) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_timeline_remove_layer(self.to_glib_none().0, layer.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::ges_timeline_remove_layer(self.to_glib_none().0, layer.to_glib_none().0), "Failed to remove layer")
         }
     }
 
diff --git a/gstreamer-editing-services/src/auto/track.rs b/gstreamer-editing-services/src/auto/track.rs
index 95f81764b..b9ba55fb9 100644
--- a/gstreamer-editing-services/src/auto/track.rs
+++ b/gstreamer-editing-services/src/auto/track.rs
@@ -44,7 +44,7 @@ impl Track {
 }
 
 pub trait TrackExt {
-    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> bool;
+    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError>;
 
     fn commit(&self) -> bool;
 
@@ -56,7 +56,7 @@ pub trait TrackExt {
 
     fn get_timeline(&self) -> Option<Timeline>;
 
-    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> bool;
+    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError>;
 
     //fn set_create_element_for_gap_func(&self, func: /*Unknown conversion*//*Unimplemented*/CreateElementForGapFunc);
 
@@ -92,9 +92,9 @@ pub trait TrackExt {
 }
 
 impl<O: IsA<Track> + IsA<glib::object::Object>> TrackExt for O {
-    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> bool {
+    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_track_add_element(self.to_glib_none().0, object.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::ges_track_add_element(self.to_glib_none().0, object.to_glib_none().0), "Failed to add element")
         }
     }
 
@@ -128,9 +128,9 @@ impl<O: IsA<Track> + IsA<glib::object::Object>> TrackExt for O {
         }
     }
 
-    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> bool {
+    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::ges_track_remove_element(self.to_glib_none().0, object.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::ges_track_remove_element(self.to_glib_none().0, object.to_glib_none().0), "Failed to remove element")
         }
     }