I have never seen this error, but two comments:
- Netbeans plugins URL is
http://first.wpi.edu/FRC/java/netbea...te/updates.xml . Make sure you are using the latest.
- Your subnet mask should be 255.255.255.0 or 255.0.0.0 but not 255.255.255.255 . This may be affecting your communications.
Let us know what you change to resolve this error.