Undefined index

[brabont]

I keep getting huge amounts of errors like "   Type of error: Undefined - 8: Undefined index:". All of this errors are related to "forum/Sources/Subs.php (Line 3091)" and this line of the file is "return $smileyPregReplacements[$matches[1]];".

What is this about and how can I fix this?

[Shambles]

https://www.simplemachines.org/community/index.php?topic=567106

[brabont]

I'm blind. Thank you for the quick answer.