Android SDK path is not configured. - Set the property sdk.dir in the file build/android.properties to point to your Android SDK folder. - For example, on Mac OS X: sdk.dir=/Users/YOUR_NAME/android-sdk-mac_x86. - This property must not end with a trailing slash. Jar '${jarfile}' will NOT be signed. The keystore file cannot be found. (to suppress this message, enable the quiet option: -quiet, -q) Follow these instructions to enable Jar file signing: 1. Create a plain text file named 'keystore.properties' in the World Wind project root folder. 2. Give the file 'keystore.properties' the following contents: keystore.file=[myKeystore] keystore.alias=[myAlais] keystore.storepass=[myPassword] keystore.tsaurl=[URL for timestamp authority] 3. If you don't have a keystore, you can create a temporary one as follows (use [myPassword] as the password): keytool -genkey -Keystore ./[myKeystore] -alias [myAlias] keytool -selfcert -Keystore ./[myKeystore] -alias [myAlias] For help with keystores or signing Jar files, see http://java.sun.com/j2se/1.5.0/docs/guide/security/SecurityToolsSummary.html