this is the problem with latest adt that is 20.0.3. you can instead rename the *.9.png to *.png and start working. i think this is the bug with the adt only, since for 18.0.0 version adt it doesnt prompts for this type of error and works fine
就是把.9.png 后缀改成 .png
原文：http://www.cnblogs.com/wanjiang/p/6337437.html