diff --git a/src/arvcamera.c b/src/arvcamera.c
index d7c05be7f..7e7624270 100644
--- a/src/arvcamera.c
+++ b/src/arvcamera.c
@@ -2428,9 +2428,8 @@ arv_camera_is_binning_available (ArvCamera *camera, GError **error)
 }
 
 /**
- * arv_camera_get_representation_gain:
+ * arv_camera_get_gain_representation:
  * @camera: a #ArvCamera
- * @error: a #GError placeholder, %NULL to ignore
  *
  * Return: enum ArvGcRepresentation, -1 if not available.
  *
@@ -2438,27 +2437,26 @@ arv_camera_is_binning_available (ArvCamera *camera, GError **error)
  */
 
 ArvGcRepresentation
-arv_camera_get_representation_gain (ArvCamera *camera, GError **error)
+arv_camera_get_gain_representation (ArvCamera *camera)
 {
 	ArvCameraPrivate *priv = arv_camera_get_instance_private (camera);
 
 	g_return_val_if_fail (ARV_IS_CAMERA (camera), FALSE);
 
 	if (priv->has_gain)
-		return arv_device_get_representation (priv->device, "Gain", error);
+		return arv_device_get_representation (priv->device, "Gain");
 
 	if (priv->gain_raw_as_float)
-		return arv_device_get_representation (priv->device, "GainRaw", error);
+		return arv_device_get_representation (priv->device, "GainRaw");
 	if (priv->gain_abs_as_float)
-		return arv_device_get_representation (priv->device, "GainAbs", error);
+		return arv_device_get_representation (priv->device, "GainAbs");
 
-	return arv_device_get_representation (priv->device, "GainRaw", error);
+	return arv_device_get_representation (priv->device, "GainRaw");
 }
 
 /**
- * arv_camera_get_representation_exposure_time:
+ * arv_camera_get_exposure_time_representation:
  * @camera: a #ArvCamera
- * @error: a #GError placeholder, %NULL to ignore
  *
  * Return: enum ArvGcRepresentation, -1 if not available.
  *
@@ -2466,7 +2464,7 @@ arv_camera_get_representation_gain (ArvCamera *camera, GError **error)
  */
 
 ArvGcRepresentation
-arv_camera_get_representation_exposure_time (ArvCamera *camera, GError **error)
+arv_camera_get_exposure_time_representation (ArvCamera *camera)
 {
 	ArvCameraPrivate *priv = arv_camera_get_instance_private (camera);
 
@@ -2474,15 +2472,14 @@ arv_camera_get_representation_exposure_time (ArvCamera *camera, GError **error)
 
 	switch (priv->series) {
 		case ARV_CAMERA_SERIES_XIMEA:
-			return arv_device_get_representation (priv->device, "ExposureTime", error);
+			return arv_device_get_representation (priv->device, "ExposureTime");
 		case ARV_CAMERA_SERIES_RICOH:
-			return arv_device_get_representation (priv->device, "ExposureTimeRaw", error);
+			return arv_device_get_representation (priv->device, "ExposureTimeRaw");
 		case ARV_CAMERA_SERIES_IMPERX_CHEETAH:
-			return arv_device_get_representation (priv->device, "ExposureMode", error);
+			return arv_device_get_representation (priv->device, "ExposureMode");
 		default:
 			return arv_device_get_representation (priv->device,
-								priv->has_exposure_time ?  "ExposureTime" : "ExposureTimeAbs",
-								error);
+								priv->has_exposure_time ?  "ExposureTime" : "ExposureTimeAbs");
 	}
 }
 
@@ -3027,7 +3024,6 @@ arv_camera_is_feature_implemented (ArvCamera *camera, const char *feature, GErro
  * arv_camera_get_representation:
  * @camera: a #ArvCamera
  * @feature: feature name
- * @error: a #GError placeholder, %NULL to ignore
  *
  * Return: enum ArvGcRepresentation, -1 if not available.
  *
@@ -3035,13 +3031,13 @@ arv_camera_is_feature_implemented (ArvCamera *camera, const char *feature, GErro
  */
 
 ArvGcRepresentation
-arv_camera_get_representation (ArvCamera *camera, const char *feature, GError **error)
+arv_camera_get_representation (ArvCamera *camera, const char *feature)
 {
 	ArvCameraPrivate *priv = arv_camera_get_instance_private (camera);
 
 	g_return_val_if_fail (ARV_IS_CAMERA (camera), FALSE);
 
-	return arv_device_get_representation (priv->device, feature, error);
+	return arv_device_get_representation (priv->device, feature);
 }
 
 /**
diff --git a/src/arvcamera.h b/src/arvcamera.h
index c489a4503..c4882beb8 100644
--- a/src/arvcamera.h
+++ b/src/arvcamera.h
@@ -134,7 +134,7 @@ ARV_API double		arv_camera_get_exposure_time		(ArvCamera *camera, GError **error
 ARV_API void		arv_camera_get_exposure_time_bounds	(ArvCamera *camera, double *min, double *max, GError **error);
 ARV_API void		arv_camera_set_exposure_time_auto	(ArvCamera *camera, ArvAuto auto_mode, GError **error);
 ARV_API ArvAuto		arv_camera_get_exposure_time_auto	(ArvCamera *camera, GError **error);
-ARV_API ArvGcRepresentation arv_camera_get_representation_exposure_time(ArvCamera *camera, GError **error);
+ARV_API ArvGcRepresentation arv_camera_get_exposure_time_representation(ArvCamera *camera);
 
 ARV_API void		arv_camera_set_exposure_mode		(ArvCamera *camera, ArvExposureMode mode, GError **error);
 
@@ -150,7 +150,7 @@ ARV_API double		arv_camera_get_gain			(ArvCamera *camera, GError **error);
 ARV_API void		arv_camera_get_gain_bounds		(ArvCamera *camera, double *min, double *max, GError **error);
 ARV_API void		arv_camera_set_gain_auto		(ArvCamera *camera, ArvAuto auto_mode, GError **error);
 ARV_API ArvAuto		arv_camera_get_gain_auto		(ArvCamera *camera, GError **error);
-ARV_API ArvGcRepresentation arv_camera_get_representation_gain  (ArvCamera *camera, GError **error);
+ARV_API ArvGcRepresentation arv_camera_get_gain_representation  (ArvCamera *camera);
 
 ARV_API gboolean	arv_camera_is_black_level_available	(ArvCamera *camera, GError **error);
 ARV_API gboolean	arv_camera_is_black_level_auto_available(ArvCamera *camera, GError **error);
@@ -210,7 +210,7 @@ ARV_API gboolean        arv_camera_is_enumeration_entry_available
 ARV_API gboolean	arv_camera_is_feature_available			(ArvCamera *camera, const char *feature, GError **error);
 ARV_API gboolean        arv_camera_is_feature_implemented               (ArvCamera *camera, const char *feature, GError **error);
 
-ARV_API ArvGcRepresentation	arv_camera_get_representation		(ArvCamera *camera, const char *feature, GError **error);
+ARV_API ArvGcRepresentation	arv_camera_get_representation		(ArvCamera *camera, const char *feature);
 
 
 /* Runtime policies */
diff --git a/src/arvdevice.c b/src/arvdevice.c
index f270a0385..da008ed62 100644
--- a/src/arvdevice.c
+++ b/src/arvdevice.c
@@ -397,7 +397,6 @@ _get_feature (ArvDevice *device, GType node_type, const char *feature, GError **
  * arv_device_get_representation:
  * @device: a #ArvDevice
  * @feature: feature name
- * @error: a #GError placeholder, %NULL to ignore
  *
  * Return: enum ArvGcRepresentation, -1 if not available.
  *
@@ -405,7 +404,7 @@ _get_feature (ArvDevice *device, GType node_type, const char *feature, GError **
  */
 
 ArvGcRepresentation
-arv_device_get_representation (ArvDevice *device, const char *feature, GError **error)
+arv_device_get_representation (ArvDevice *device, const char *feature)
 {
 	ArvGcNode* node;
 
diff --git a/src/arvdevice.h b/src/arvdevice.h
index c58443df5..f973c510c 100644
--- a/src/arvdevice.h
+++ b/src/arvdevice.h
@@ -112,7 +112,7 @@ ARV_API gboolean 	arv_device_is_feature_available		(ArvDevice *device, const cha
 ARV_API gboolean 	arv_device_is_feature_implemented	(ArvDevice *device, const char *feature, GError **error);
 ARV_API ArvGcNode *	arv_device_get_feature			(ArvDevice *device, const char *feature);
 ARV_API ArvGcAccessMode	arv_device_get_feature_access_mode	(ArvDevice *device, const char *feature);
-ARV_API ArvGcRepresentation	arv_device_get_representation	(ArvDevice *device, const char *feature, GError **error);
+ARV_API ArvGcRepresentation	arv_device_get_representation	(ArvDevice *device, const char *feature);
 
 ARV_API ArvChunkParser *arv_device_create_chunk_parser		(ArvDevice *device);
 
diff --git a/viewer/arvviewer.c b/viewer/arvviewer.c
index d3228e6b9..de5c2d08d 100644
--- a/viewer/arvviewer.c
+++ b/viewer/arvviewer.c
@@ -770,7 +770,7 @@ set_camera_widgets(ArvViewer *viewer)
 	// enables gtk widget based on feature representation
 	is_gain_available = arv_camera_is_gain_available (viewer->camera, NULL);
 	if (is_gain_available){
-		viewer->gain_representation = (gint)(arv_camera_get_representation_gain(viewer->camera, NULL));
+		viewer->gain_representation = (gint)(arv_camera_get_gain_representation(viewer->camera));
 		switch(viewer->gain_representation){
 			case ARV_GC_REPRESENTATION_UNDEFINED:
 			case ARV_GC_REPRESENTATION_LINEAR:
@@ -802,7 +802,7 @@ set_camera_widgets(ArvViewer *viewer)
 
 	is_exposure_available = arv_camera_is_exposure_time_available (viewer->camera, NULL);
 	if (is_exposure_available){
-		viewer->exposure_time_representation = (gint)(arv_camera_get_representation_exposure_time(viewer->camera, NULL));
+		viewer->exposure_time_representation = (gint)(arv_camera_get_exposure_time_representation(viewer->camera));
 		switch(viewer->exposure_time_representation){
 			case ARV_GC_REPRESENTATION_UNDEFINED:
 			case ARV_GC_REPRESENTATION_LINEAR: