comment on

I doubt this new problem is related to the user-data.

AWS generally expects you to retry your API call when you get a 500 error.

If you keep getting them, then something is generally more seriously wrong and you should wait a while before trying again.

If you can consistently reproduce a 500 error when calling it with "X" while getting success calling it with "Y", then you may have found a bug.

I'd recommend seeking help on the EC2 forum as this no longer looks like a Perl issue:

http://ec2forum.notlong.com

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