Hello Thank you for your reply, Chris. > It is a bug that has been fixed. It will fixed in 4.11.3 when that is released. OK, I understood. >cd rtems-source-builder/rtems. > Please make sure you change into the 'rtems' directory. I have done "../source-builder/sb-set-builder --prefix ~~" from "/c/opt/rtems/4.11.2/rtems" directory, the build succeeded.