From 08b73d6e0de226e69c81f78b8f676f51a725747d Mon Sep 17 00:00:00 2001
From: Bryan Freeman <bryan.freeman@metzohanian.com>
Date: Thu, 23 Aug 2018 16:01:45 -0500
Subject: [PATCH] Fixes issue #16300

---
 pandas/io/pytables.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index c57b1c3e211f6..27cce20e9d319 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -1732,10 +1732,11 @@ def validate_col(self, itemsize=None):
                     itemsize = self.itemsize
                 if c.itemsize < itemsize:
                     raise ValueError(
-                        "Trying to store a string with len [%s] in [%s] "
-                        "column but\nthis column has a limit of [%s]!\n"
+                        "Trying to store a string with len [%s] in the "
+                        "column [%s], but\nthis column has a limit of [%s]!\n"
                         "Consider using min_itemsize to preset the sizes on "
-                        "these columns" % (itemsize, self.cname, c.itemsize))
+                        "these columns" % (itemsize, self.values[0],
+                                           c.itemsize))
                 return c.itemsize
 
         return None