Hi All, Working to build a library extension and I’m getting an error on this line when I go to test it in LCB: put "^[A-Z0-9._%+-]{1,64}@(?:[A-Z0-9-]{1,63}\.){1,125}[A-Z]{2,63}$" into tRegex The error is: illegal escape in string '^[A-Z0-9._%+-]{1,64}@(?:[A-Z0-9-]{1,63}\.){1,125}[A-Z]{2,63}$’ Any ideas? Thanks, Steve MacLean