diff -r af131b9af420 -r 43e64c770f28 src/HOL/TPTP/lib/Tools/tptp_graph
--- a/src/HOL/TPTP/lib/Tools/tptp_graph	Mon Feb 29 16:38:06 2016 +0100
+++ b/src/HOL/TPTP/lib/Tools/tptp_graph	Mon Feb 29 20:35:06 2016 +0100
@@ -118,7 +118,7 @@
 begin ML_file \"$TPTP_HOME/TPTP_Parser/tptp_to_dot.ML\" \
 ML {* TPTP_To_Dot.write_proof_dot \"$1\" \"$2\" *} end" \
         > $WORKDIR/$LOADER.thy
-  "$ISABELLE_PROCESS" -e "use_thy \"$WORKDIR/$LOADER\"; exit 0;" Pure
+  "$ISABELLE_PROCESS" -e "use_thy \"$WORKDIR/$LOADER\";" -q Pure
 }
 
 function cleanup_workdir()