Ciao Cd.K The "brackets problem" is actually documented at https://tiddlywiki.com/#regexp%20Operator
| The filter syntax <https://tiddlywiki.com/#Filter%20Run> makes it impossible to directly specify a regular expression that contains square brackets. There is also an example at: https://tiddlywiki.com/#regexp%20Operator%20(Examples) I agree it might be highlighted more like this ... | The filter syntax <https://tiddlywiki.com/#Filter%20Run> makes it impossible to directly specify a regular expression that contains regex character class [...] brackets. Best wishes TT On Friday, 20 September 2019 12:38:50 UTC+2, Cd.K wrote: > > Bottom line: > > There was no hint that RegExp does not work completely in Advanced Search > and TiddlyWiki issues a wrong error message at this point. > > > > [image: 20-09-_2019_12-26-48.png] > > I created issue #4267: here at github.com/Jermolene/TiddlyWiki5/ > <https://github.com/Jermolene/TiddlyWiki5/issues/4267#issue-496278298> > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/d8bff85d-1838-468f-b80d-3cedfbb1f60b%40googlegroups.com.