Export wizard Coversion to dalvik format failed with error 1

公司还用的是eclipse，昨天打包的时候 遇到Export wizard Coversion to dalvik format failed with error 1,的问题，网上搜寻很多办法无解，查看eclipse log文件也并没有代码报错。最后通过stackoverflow 搜索良久，挨个尝试，最终解决，仅以参考。

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Upgrade your Proguard to its latest version i.e., 4.7... Dowload the zip from http://sourceforge.net/projects/proguard/files/latest/download?source=files .... then copy the "lib" and "bin" folders from the zip to your sdk/tools/proguard/ to replace the default or say old "bin" and "lib" .... try exporting your project once again...