WordPress Error: The plugin generated 1 characters of unexpected output during activation

Thanks for the post. You saved my bacon!

I was trying to activate supple forms and i am getting htis message”The plugin generated 10 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.”
I opened all php extension files in note pad i could not find any white spaces Link:http://wordpress.org/extend/plugins/supple-forms/

Can any body help me please latest i am using WP version

thanks from France my friend!!

thanks, my problem is solved.