I am looking for a very efficient way of finding complex rregular expressions in big file and I stumbled upon HyperScan library. I got it compiled, but if I try to compile any regex, I get a NotLiteral error. What I am trying to do is find every comment in a g-code file (comments start with a semicolon and go to the end of line). So, the standard regex for finding those lines would be *;.** with multiline enabled. As far as I understand your documentation, the string literal I should pass as an input is */;.*/* But when I try to parse it, I get a NotLiteral in line 89 of shortcut_literal.cpp (c.m_max equals 4294967295). I tried many variations like *";.*"*, *"/;.*/"*, *"/;.*/s"* and *"/;.*/m"* but none of them works, [image: Przechwytywanie.PNG] Is there something wrong with my expression or can it be possibly caused that I compiled the HyperScan without PCRE library? I thought of the latter, but as far I can get it to compile. Here is what I get when I try to compile the HyperScan CMake project with PCRE library: [image: Adnotacja 2018-10-31 165503.jpg] What Can I do to make this thing work? Regards, Daniel.