ERR: EmptyValue must reference a valid KeyStore key

Code:

jarsigner: Certificate chain not found for: EmptyValue.  EmptyValue must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain.

Not sure why I am getting this error.

my keystore is fine.

I uninstall java sdk 1.7 u45 and went back to 1.6 u30, but same error.

can someone please suggest?