Don't suppress error messages.
diff --git a/documentation/Makefile.in b/documentation/Makefile.in
index 9efa7f1..375994c 100644
--- a/documentation/Makefile.in
+++ b/documentation/Makefile.in
@@ -50,10 +50,10 @@
$(DB2HTML) $(BOOKNAME).sgml
$(BOOKNAME).pdf: $(BOOK_SRCS)
- db2pdf $(BOOKNAME).sgml > /dev/null 2>&1
+ db2pdf $(BOOKNAME).sgml > /dev/null
$(BOOKNAME).ps: $(BOOK_SRCS)
- db2ps $(BOOKNAME).sgml > /dev/null 2>&1
+ db2ps $(BOOKNAME).sgml > /dev/null
install::
$(INSTALL) -d $(mandir)/man$(prog_manext)