diff --git a/.gitignore b/.gitignore
index 1bc5aa12428cefb7f40466014928b695ce8b9d71..5bd576372297e2b079d00c5b60df12e10e05e6ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /.coverage
+/icartt.egg-info
\ No newline at end of file
diff --git a/icartt/dataset.py b/icartt/dataset.py
index 2b760476ecd0dab3ad3c569039231d6791223dc2..10461e46c4658205551f63a3482d4acaae1c69a3 100644
--- a/icartt/dataset.py
+++ b/icartt/dataset.py
@@ -527,7 +527,7 @@ class Dataset:
         
         # for 2210
         self.IBVAR        = None
-        self.AUXVAR       = []
+        self.AUXVARS      = {}
         
         self.splitChar    = splitChar