Hi Michael, you probably figured this out by now, but for future reference: You have to log to stderr to make the script fail.
This example works (as in /does not build/ ;) ): file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/skript.cmake" CONTENT "message(FATAL_ERROR \"Script failed!!\")" ) add_custom_target(runSkript COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/skript.cmake ) btw: Using CMake 3.10 Greetings, Felix -- Sent from: http://cmake.3232098.n2.nabble.com/ -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake