From d0160316705e073a3e5ff7f294f3873a64a87842 Mon Sep 17 00:00:00 2001
From: mickey-tsai <126633857+mickey-tsai@users.noreply.github.com>
Date: Thu, 6 Jun 2024 17:58:48 +0800
Subject: [PATCH] fix the key of __transient_vector

the key should be per not d
---
 flopy/export/vtk.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flopy/export/vtk.py b/flopy/export/vtk.py
index 07024a5b8b..96703dc678 100644
--- a/flopy/export/vtk.py
+++ b/flopy/export/vtk.py
@@ -1489,7 +1489,7 @@ def write(self, f: Union[str, os.PathLike], kper=None):
                                 self.add_array(array, name)
 
                             if per in self.__transient_vector:
-                                d = self.__transient_vector[d]
+                                d = self.__transient_vector[per]
                                 for name, vector in d.items():
                                     self.add_vector(vector, name)