diff --git a/mindspore/ccsrc/minddata/mindrecord/io/shard_writer.cc b/mindspore/ccsrc/minddata/mindrecord/io/shard_writer.cc
index 2f2aebf7f012f2a4df8b53f9b927344b2b1c3d60..84b0c5b37a174470b9bee42ed93ef4be22a2c978 100644
--- a/mindspore/ccsrc/minddata/mindrecord/io/shard_writer.cc
+++ b/mindspore/ccsrc/minddata/mindrecord/io/shard_writer.cc
@@ -83,7 +83,7 @@ MSRStatus ShardWriter::OpenDataFiles(bool append) {
       // if not append and mindrecord file exist, return FAILED
       fs->open(common::SafeCStr(file), std::ios::in | std::ios::binary);
       if (fs->good()) {
-        MS_LOG(ERROR) << "MindRecord file already existed.";
+        MS_LOG(ERROR) << "MindRecord file already existed, please delete file: " << common::SafeCStr(file);
         fs->close();
         return FAILED;
       }
diff --git a/mindspore/dataset/engine/datasets.py b/mindspore/dataset/engine/datasets.py
index 3b774f4a1b7ca6f19f56f7de75a28f4db7559f57..afacb68089cb896317d2576b8094f40a2b7cff7a 100644
--- a/mindspore/dataset/engine/datasets.py
+++ b/mindspore/dataset/engine/datasets.py
@@ -1082,7 +1082,7 @@ class Dataset:
              - None
              - Not support
            * - DE_FLOAT16
-             - float32
+             - Not support
              -
            * - DE_FLOAT32
              - float32