I'd like to add a new directory named CAP at MonetDBRoot/sql/backends/monet5 The new directory contains cap.c, cap.h, cap.mal, 80_cap.mal, 80_cap.sql, and makefile.ag I modified MonetDBRoot/sql/backends/monet5/Makefile.ag at: SUBDIRS = NOT_WIN32?vaults UDF CAP LSST ENABLE_DATACELL?datacell However, when I run MonetDBRoot/bootstrap, i got the following error message: ... /home/adnan/MonetDB-11.15.11/sql/backends/monet5 /home/adnan/MonetDB-11.15.11/sql/backends/monet5/vaults /home/adnan/MonetDB-11.15.11/sql/backends/monet5/UDF /home/adnan/MonetDB-11.15.11/sql/backends/monet5/CAP Traceback (most recent call last): File "buildtools/autogen/autogen.py", line 157, in <module> (InstallList, DocList, OutList) = main(topdir, topdir, automake, []) File "buildtools/autogen/autogen.py", line 147, in main main(d, topdir, automake, incdirsmap, conditional + cond) File "buildtools/autogen/autogen.py", line 147, in main main(d, topdir, automake, incdirsmap, conditional + cond) File "buildtools/autogen/autogen.py", line 147, in main main(d, topdir, automake, incdirsmap, conditional + cond) File "buildtools/autogen/autogen.py", line 147, in main main(d, topdir, automake, incdirsmap, conditional + cond) File "buildtools/autogen/autogen.py", line 132, in main read_makefile(p, cwd) File "buildtools/autogen/autogen.py", line 96, in read_makefile p.parse(token, lineno, line) File "buildtools/autogen/autogen.py", line 71, in parse v = self.stack[last] IndexError: list index out of range Any idea please?