Thanx! This really works!  Those are called "atomic grouping" right?

Hi! I need a regexp that does the following: For example we're having a string "abcmnbcxyz"   I need to build a regexp that will find everythig that goes before "z" but not containing "bc" I was trying to use lookups like that one: "(?<!bc).*?z" but it matches whole string. positive ...