There are many ways you can accomplish this. To name a few:

• addme.pl doesn't output any error messages. Instead, it just exits with a particular value. signup.pl captures the exit code, and uses a lookup table to see what happened.
• You'd use IPC::Open3 to open addme.pl, and read from its standard error what the error is.
• $err = qx /addme.pl 2>&1/;

Abigail

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