On Mon, 21 Sep 2015 10:12:17 +0300 FreeMan <freeman35 at delphiturkiye.com> wrote: > I changed "<TargetOS Value="darwin"/>" to "<TargetOS Value="win64"/>" > in project.lpi, then open in lazarus, IDE lock and this is gdb bt > result, what can be problem ? What fpc version do you use to build the IDE? Mattias