Sometimes error messages will appear on BlackBerry smartphones, including the Curve 8530 model. “App Error 523” is related to the Curve encountering a problem with the Java Virtual Machine. JVM is software for the programming environment used in some of the BlackBerry applications. This error can be corrected through performing some troubleshooting.
Things You’ll Need : USB cable
Perform a phone reset by removing the battery from the Curve and putting back in again. Remove the cover on the back of the phone, pull the battery out, wait a moment, reinstall the battery and replace the cover. Turn the phone back on.
Upgrade the BlackBerry Device Software if the error continues to display. Use a USB cable to connect your Blackberry to the computer you use to sync.