From: Hidetoshi NAGAI <nagai@...>
Date: 2009-05-18T17:15:03+09:00
Subject: Re: TkPhotoImage.copy always gives "too many colors" Error

From: "C. Dagnon" <c-soc-rubyforum@dagnon.net>
Subject: TkPhotoImage.copy always gives "too many colors" Error
Date: Mon, 18 May 2009 08:21:57 +0900
Message-ID: <38c5acd35dd5a955ae54291b4c510e3f@ruby-forum.com>
> too many colors (RuntimeError)

This error message is generated in a GIF write function of Tcl/Tk
("CommonWriteGIF" function in stardard Tcl/Tk and tkImg extension), 
when color map size of an image is larger than 256.
So, it doesn't depend on Ruby/Tk. 

I'm sorry but I have no solution. 
The only what I can say is "Could you try to use 'format' option?".
-- 
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)