On Linux Mint 17.1 x86_64, Cordova v4.3.0 gives this error:
$ cordova run android
Running command: /home/naman/test/platforms/android/cordova/run
WARNING :
I encountered this issue now too. The problem in my case is that the ant.properties file that I'm using is pointed to wrong and NOT existing file.
key.store=D:/Fedmich/_keys/android.keystore
After correcting it, I was able to compile a release apk. Hope this helps someone in the future. Just be sure to read the error_logs that is given in the command prompt.