Hi,
The particular triggers for this message in Undernet ircu are:
- Username containing both upper and lower case, but starting with lower case.
- Username containing both upper case and lower case, and at least 3 leading upper case characters.
- Two groups of digits, but neither is at the start or end of the username.
- More than three groups of digits.
- Any of -_. after -_. or at the start of the username, or more than two of those anywhere in the username.
- No letters at all.
- Last character is punctuation rather than letter or number.
If you choose a username that does not trigger any of the conditions above, you will be able to avoid this error.
