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I am trying to add a long table of figures into latex. I am able to successfully add in \documentclass[12pt]{article}.

But when I try adding it in the following document class, I get error:

\documentclass[letterpaper, 10 pt, conference]{ieeeconf}  


**Package longtable error: longtable not in 1-column mode \begin{longtable}**

The code for table I created is:

%Row1 __________________________________________________________________________
Image & result &My comments \\

{Images/support/region_000938_1.eps}} & xxxx \\

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In two column longtable doesn't work as of now. You may use supertabular instead. – Harish Kumar Jan 20 '13 at 7:08
ok...I will try. thanks :) – Swagatika Jan 20 '13 at 10:19
Please have mercy to your readers and don't use tables on a conference paper that lasts more than one column or a page. – percusse Jan 20 '13 at 10:56
thanks for the feedback :) – Swagatika Jan 20 '13 at 11:04

longtable works in two columns if you use the code from

multi-page two column table in a single column document

Note I used

\documentclass[letterpaper, 10pt,]{IEEEconf}  

as that appears to be the class name with uppercase IEEE and 10pt should have no space, and the version I have in TeXLive 2012 complained about the conference option.

enter image description here

\documentclass[letterpaper, 10pt,]{IEEEconf}  






\begin{longtable}{| l || c |}
\caption{Some square numbers\label{tab:xxx}}\\
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