diff --git a/pyproject.toml b/pyproject.toml
index d16a914..cfc317c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rda_python_common"
-version = "2.1.5"
+version = "2.1.6"
 authors = [
   { name="Zaihua Ji", email="zji@ucar.edu" },
 ]
diff --git a/src/rda_python_common/pg_file.py b/src/rda_python_common/pg_file.py
index 4f8ffa2..69502d9 100644
--- a/src/rda_python_common/pg_file.py
+++ b/src/rda_python_common/pg_file.py
@@ -3007,7 +3007,7 @@ def clean_delete_directory(self, logact = 0):
             elif dstat > 0:
                if dstat == 1 and lvl > 0: self.pglog(dinfo + ": Directory not empty yet", lact)
                continue
-            pdir = self.dirname(dir)
+            pdir = op.dirname(dir)
             if lvl and pdir and not re.match(r'^(\.|\./|/)$', pdir): dirs[pdir] = host
          if not dirs: break
          self.DELDIRS = dirs