diff --git a/container/README.md b/container/README.md
index a253e811a627af8feaca3c50f821d6391d4dc99b..bd48ef5d3a2c35610e7d38f74e0a5d2bab2c3090 100644
--- a/container/README.md
+++ b/container/README.md
@@ -65,7 +65,8 @@ singularity build openeuler-kgcc9-openmpi4-qe-6.4.sif openeuler-kgcc9-openmpi4-q
 ```
 cp ./templates/qe/6.4/data.qe.container.config ./
 ./jarvis -use data.qe.container.config
-./jarvis -d -dp
+./jarvis -d -dp -e
+source ./env.sh
 ```
 
 5.5 运行容器(-np 后面的数字为核数，请按实际核数指定)
diff --git a/src/configService.py b/src/configService.py
index ae0652a46fc06466f55fe81f3756c2323f30a15b..12fabdc4a1a52ea5a92b062b599f21d09ccbaa64 100644
--- a/src/configService.py
+++ b/src/configService.py
@@ -14,6 +14,10 @@ class ConfigService:
 
     def switch_config(self, config_file):
         print(f"Switch config file to {config_file}")
+        config_path = os.path.join(self.ROOT, config_file)
+        if not os.path.exists(config_path):
+            print("config_path not found, switch failed.")
+            return
         self.tool.write_file(self.meta_path, config_file.strip())
-        print("Successfully switched.")
+        print("Successfully switched. config file saved in file .meta")
 
diff --git a/src/dataService.py b/src/dataService.py
index 32b8162881ce5d6a3953cb3260ec047520503c01..55d1ac1e353a91a3de7b008e527d9855e422db2f 100644
--- a/src/dataService.py
+++ b/src/dataService.py
@@ -5,7 +5,18 @@ import platform
 
 from toolService import ToolService
 
-class DataService:
+class Singleton(type):
+
+    def __init__(self, name, bases, dictItem):
+        super(Singleton,self).__init__(name,bases, dictItem)
+        self._instance = None
+
+    def __call__(self, *args, **kwargs):
+        if self._instance is None:
+            self._instance = super(Singleton,self).__call__(*args, **kwargs)
+        return self._instance
+
+class DataService(object,metaclass=Singleton):
     # Hardware Info
     avail_ips=''
     # Dependent Software environment Info
@@ -49,6 +60,9 @@ class DataService:
     def get_data_config(self):
         file_name = self.get_config_file_name()
         file_path = self.get_abspath(file_name)
+        if not os.path.exists(file_path):
+            print("config file not found, switch to default data.config.")
+            file_path = self.get_abspath(DataService.config_file)
         with open(file_path, encoding='utf-8') as file_obj:
             contents = file_obj.read()
             return contents.strip()
@@ -140,7 +154,9 @@ cd {DataService.build_dir}
 {DataService.clean_cmd}
 '''
     def get_env(self):
-        return f'''
+        return f'''set -x
+set -e
+source ./init.sh
 ./jarvis -e
 source ./{DataService.env_file}'''