From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dillon Peng <pengcz.nwpu@gmail.com>
Subject: why I got the message
Date: Wed, 19 Mar 2014 10:55:25 +0000 (UTC)
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hi, all
   my emacs is GNU Emacs 24.0.95.1 (x86_64-redhat-linux-gnu, 
GTK+ Version 2.24.10),  
org is 8.2.5h   when I used C-c | to add a table 5X2 as follows:
 | d |   |   |   |   |
|---+---+---+---+---|
| d |   |   |   |   |
  and place cursor at "d" in 1 x 1, and 
(1) press M-x org-table-delete-column, 
I got the following message: 
user-error: This command is active in special context like tables,
                                   headlines or items  
(2) press M-x org-table-insert-row, I got :
Not at a table

how to resolve it, or what I missed, any advice will be appreciated!

Dillon Peng