Dear Boost.Build expert, I do have Boost 1.69 and was able to build from the sources with Mingw-w64 gcc 8.1 on Windows 7. That was for boost itself, but now I need to build the tests for the Boost library Spirit (the parser). I cannot get this to work. My Boost.Build version is 2018.02-git. According to Boost.Build paragraph 3.3 Configuration, the option "b2 --debug-configuration" gives info how my boost.build is configured. In the folder <boost-build>\example\hello the output of "b2 --debug-configuration" looks fine. But when I run from the folder <boost-spirit-develop>\test "b2 --debug-configuration" the output contains: error: Could not find parent for project at '.'. So in the folder <boost-spirit-develop>\test I rename Jamfile to Jamroot.jam. Now with "b2 --debug-configuration" I get: output.txt (attachtment of this email) Also when I try to build the tests it I gets the same error messages strarting from: config.jam: No such file or directory How do I solve this? Best regards, Maarten Verhage