--- run_beamnrc_old.tcl	2006-02-13 22:40:17.000000000 +0100
+++ run_beamnrc.tcl	2006-11-10 15:02:49.000000000 +0100
@@ -354,7 +354,7 @@
            }
            puts $arg
            set batch_script [file join $hen_house scripts run_user_code_batch]
-           set rpipe [open "|$batch_script BEAM_${mod_base}${opt} $inp_base $pegs4base $arg 2>&1" "r"]
+           set rpipe [open "|$batch_script BEAM_${mod_base}${opt} $inp_base $pegs4base $arg 2> batch.log" "r"]
        }
        fconfigure $rpipe -blocking 0
        fileevent $rpipe readable [list My_Reader $rpipe]