From a499bf1ed88174c60cfbd098f80036d59f4e1b67 Mon Sep 17 00:00:00 2001
From: Ward Fisher <wfisher@ucar.edu>
Date: Tue, 14 Jun 2016 10:29:14 -0600
Subject: [PATCH] Extending when attributes are copied.

---
 libsrc4/nc4hdf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libsrc4/nc4hdf.c b/libsrc4/nc4hdf.c
index 4624fa4c7..9f407c736 100644
--- a/libsrc4/nc4hdf.c
+++ b/libsrc4/nc4hdf.c
@@ -2186,6 +2186,7 @@ write_var(NC_VAR_INFO_T *var, NC_GRP_INFO_T *grp, nc_bool_t write_dimid)
               {
                 /* Indicate that the variable already exists, and should be replaced */
                 replace_existing_var = NC_TRUE;
+                flag_atts_dirty(&var->att);
                 break;
               }
           }