D:\SDK\sdk\tools>java -jar baksmali-2.1.3.jar -o classout classes.dex
Exception in thread "main" org.jf.util.ExceptionWithContext: classes.dex is not
an apk, dex, odex or oat file.
at org.jf.dexlib2.DexFileFactory.loadDexFile(DexFileFactory.java:186)
at org.jf.dexlib2.DexFileFactory.loadDexFile(DexFileFactory.java:78)
at org.jf.baksmali.main.main(main.java:292)