as-update-launch-config Doesn't Support "Nil" Keys or Security Groups

[colinbjohnson]

in an email from a user regarding as-update-launch-config:

Only thing response to you is that, if user didn't set --key or --group when create launch config, when he uses as-update-launch-config, it'll meet issues like, The Auto Scaling Group "xxxx" uses the security group "(nil)". The Auto Scaling Group "xxxx" uses the key "(nil)." and fail the process.