[Geotools-gt2-users] Error while parsing JAI registry file

[商. <jin...@12...>]

Hey,everyone! when I  start up my project and load the map,then the message below will appear in the console! I have searched it in the internet but get nothing! 
Error while parsing JAI registry file "file:/E:/java/workspace/GeoTools%20Download/geotools-8.4/imageio-ext-imagereadmt-1.1M012010.jar!/META-INF/registryFile.jai" :
Error in registry file at line number #29
A descriptor is already registered against the name "ImageReadMT" under registry mode "rendered"

2013-04-16



Jinqiu Shang