Unable to sign apk

I’m unable to generate signed apk. Here re the error messages I’m getting -
When I entered this command

$ jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore keystore_name.keystore unsigned.apk alias_name

I got this error-

Enter Passphrase for keystore:jarsigner error: java.lang.RuntimeException: keystore load: G:\codecaynon\new good\ionic-2-app-woo_v44\app\keystore.keystore (The system cannot find the file specified)

Probably is because directory, did you try run this comand inside build directory?