It isn't a variable, it's an custom identifier (alias) that's not provided by mIRC. $isalias isn't able to reference local aliases, which $ipef2 must be. Check the file that's using it.
No file's using it, just the script itself has the variable.
However, I notice that removing it seems to no longer be breaking the clone detection script in v7.32.
Hmm. I have no idea what this is for though and removing it seems to have worked.
Is there anything that you or anyone can see to improve this?
