diff --git a/labsw/mech/doit b/labsw/mech/doit
index f5b5bfd..821f9ac 100755
--- a/labsw/mech/doit
+++ b/labsw/mech/doit
@@ -33,7 +33,7 @@ while [ $yi -lt $YN ]; do
     xi=0
     while [ $xi -lt $XN ]; do
 
-	cameo <<EOF || exit
+	cat <<EOF >_job
 mm
 gnuplot $MILL front.gp
 
@@ -58,6 +58,9 @@ offset
 append mill.gp
 EOF
 
+	cameo _job || exit
+	rm -f _job
+
 	write=append
 	xi=`expr $xi + 1`
     done