Hi! I have tried to do a "port upgrade installed", but it does not complete. Repeatedly, I get this for libidl: ---> Activating libidl 0.8.6_0 ---> Deactivating libidl 0.8.6_0 ---> Configuring libidl Error: Target com.apple.configure returned: configure failure: shell command "cd "/opt/local/var/db/dports/build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_devel_libidl/work/libIDL-0.8.7" && CFLAGS=-no-cpp-precomp ./ configure --prefix=/opt/local --mandir=/opt/local/share/man -- infodir=/opt/local/share/info" returned error 1 Command output: checking whether build environment is sane... yes checking for gawk... no checking for mawk... no checking for nawk... no checking for awk... awk checking whether make sets $(MAKE)... yes checking for style of include used by make... GNU checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ANSI C... none needed checking dependency style of gcc... gcc3 checking for strerror in -lcposix... no checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ANSI C... (cached) none needed checking dependency style of gcc... (cached) gcc3 checking how to run the C preprocessor... gcc -E checking if C preprocessor likes IDL... yes checking if C preprocessor can read from stdin... yes checking how to ignore standard include path... -I- checking for flex... flex checking for yywrap in -lfl... yes checking lex output file root... configure: error: cannot find output from flex; giving up What could the problem be? I have tried uninstall, clean and install libsdl, no luck. Also, I suspect my port registry is corrupt, since I often get complaints about reigrered port confiltcts (e.g. file exists but does not belong to any registered ports). Can it be rebuilt? Bengt Nilsson