diff --git a/pymilvus/exceptions.py b/pymilvus/exceptions.py
index 28e8c9a83..948e35a8f 100644
--- a/pymilvus/exceptions.py
+++ b/pymilvus/exceptions.py
@@ -191,7 +191,9 @@ class ExceptionsMessage:
     PartitionKeyFieldType = "Param partition_key_field must be str type."
     PartitionKeyFieldNotExist = "the specified partition key field {%s} not exist"
     IsPartitionKeyType = "Param is_partition_key must be bool type."
-    DataTypeInconsistent = "The data in the same column must be of the same type."
+    DataTypeInconsistent = (
+        "The Input data type is inconsistent with defined schema, please check it."
+    )
     DataTypeNotSupport = "Data type is not support."
     DataLengthsInconsistent = "Arrays must all be same length."
     DataFrameInvalid = "Cannot infer schema from empty dataframe."
diff --git a/pymilvus/orm/iterator.py b/pymilvus/orm/iterator.py
index 4b7675bd4..50db692b4 100644
--- a/pymilvus/orm/iterator.py
+++ b/pymilvus/orm/iterator.py
@@ -344,6 +344,9 @@ def __update_width(self, page: SearchPage):
             self._width = last_hit.distance - first_hit.distance
         else:
             self._width = first_hit.distance - last_hit.distance
+        if self._width == 0.0:
+            self._width = 0.05
+            # enable a minimum value for width to avoid radius and range_filter equal error
 
     def __set_up_range_parameters(self, page: SearchPage):
         self.__update_width(page)