make test It gives following error: "exec grep "#Antenna violations:" [index_file $::env(fastroute_log_file_tag).log 0] -s | tail -1 | sed -r "s/.*\[^0-9\]//"" (procedure "global_routing_fastroute" line 16) invoked from within "global_routing_fastroute" (procedure "global_routing" line 10) invoked from within "global_routing" (procedure "run_routing" line 27) invoked from within "run_routing" (procedure "run_non_interactive_mode" line 19) invoked from within "run_non_interactive_mode {*}$argv" invoked from within "if { [info exists flags_map(-interactive)] || [info exists flags_map(-it)] } { puts_info "Running interactively" if { [info exists arg_values(-file)..." (file "./flow.tcl" line 223)