Hi @guy038, Thanks for sending “A01466.headed.xml.txt”. Confirming your findings with some additions, note the influence of “wrap around”. Tested on a Desktop running Windows XP Home + Sp3 with Windows Classic GUI ;-) Need to get my Windows 10 x64 ready to be able to dig in and debug this! Regex A: (?si)(?<=\W)(man_n)((?:\W+\w+){0,50}\W+)(city_n)(?=\W)|(?<=\W)(?3)(?2)(?1)(?=\W) and Regex B: (?si)(?<=\W)man_n(?:\W+\w+){0,50}\W+city_n(?=\W)|(?<=\W)city_n(?:\W+\w+){0,50}\W+man_n(?=\W) and Regex D: (?si)(?<=\W)city_n(?:\W+\w+){0,50}\W+man_n(?=\W)|(?<=\W)man_n(?:\W+\w+){0,50}\W+city_n(?=\W) Pass i.e. one match even after repeated search: Find w/ wrap around; Using RegexTester (by @Claudia-Frank); Using RegexBuddy w/ boost::regex 1.58-1.59 ECMAScript (default) flavor FAIL: Find w/o wrap around - “Can’t find text” Regex C: (?si)(?<=\W)(city_n)((?:\W+\w+){0,50}\W+)(man_n)(?=\W)|(?<=\W)(?3)(?2)(?1)(?=\W) and Regex G: (?i)(?(DEFINE)(\bcity_n\b)((?:\W+\w+){0,50}\W+)(\bman_n\b))(?1)(?2)(?3)|(?3)(?2)(?1) Pass i.e. one match even after repeated search: Using RegexTester (by @Claudia-Frank); Using RegexBuddy w/ boost::regex 1.58-1.59 ECMAScript (default) flavor FAIL: Find w/ wrap around - toggles between two matches on repeated search (partial and complete text); Find w/o wrap around - “Can’t find text” Regex E: (?i)(?(DEFINE)(\bcity_n\b)((?:\W+\w+){0,50}\W+)(\bman_n\b))(?<=\W)(?1)(?2)(?3)(?=\W)|(?<=\W)(?3)(?2)(?1)(?=\W) and Regex F: (?i)(?(DEFINE)(\bcity_n\b)((?:\W+\w+){0,50}\W+)(\bman_n\b))(?<=\W)(?:(?1)(?2)(?3)|(?3)(?2)(?1))(?=\W) Pass i.e. one match even after repeated search: Using RegexTester (by @Claudia-Frank); Using RegexBuddy w/ boost::regex 1.58-1.59 ECMAScript (default) flavor FAIL: Find w/ wrap around - toggles between two matches on repeated search (partial and complete text); Find w/o wrap around - toggles between two matches on repeated search (complete text and “Can’t find text”) Regards, Menno

I tried installing the compare plug-in and after auto-restart the compare plug-in was still not there. So next time I did a manual restart and it worked.

Hi, @vasile-caraus, Now, I realized that the regex, given in my previous post, (?i-s)(Word1).*?(Word2)|(?2).*?(?1) could be simplified ! Indeed, as I explained, we can’t use back-references, which are not defined if the regex engine choose the second alternative ! But, when the boundaries Word1 and Word2 are not, themselves, regexes ( as, for instance \d+, a..z… ) and rather simple strings, we can use the more simple syntax below : (?i-s)Word1.*?Word2|Word2.*?Word1 Secondly, to select any entire line ( with its EOL characters ) containing the two words Word1 and Word2, whatever their order, use the regex, below : (?i-s)^.*(Word1.*Word2|Word2.*Word1).*\R Best Regards, guy038 P.S. : As we’re rather dealing with exact words, we should use, instead of the two above, the regexes, below : (?i-s)(?<=\W)Word1\W.*?\WWord2(?=\W)|(?<=\W)Word2\W.*?\WWord1(?=\W) and (?i-s)^.*\W(Word1\W.*\WWord2|Word2\W.*\WWord1)\W.*\R