Help , Blender Error Exporting an object to .Srobj

Good night friends, a greeting to the whole family of RZ , my problem is this . I have taken projects in blender with obj extention .
and I add all the vertex group , and everything needed to move in the silkroad . but when I try to export format Srobj the following error .http://i.picasion.com/pic82/dd259b3b...bc58186878.gif
I'm using Blender2.6Plugins to import and export .but not me ah worked since someone may be interested in the subject and give me a solution will be grateful