Abort if we can't find the tooltip file.

git-svn-id: https://svn.dealii.org/trunk@21257 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/doc/doxygen/tutorial/steps.pl b/deal.II/doc/doxygen/tutorial/steps.pl
index f1d3c32d4cf24d44f1d54c9eef93a271098a3728..b34e0d0362c0d5e232fd7ccc979c9dc585951e5e 100644 (file)
--- a/deal.II/doc/doxygen/tutorial/steps.pl
+++ b/deal.II/doc/doxygen/tutorial/steps.pl
@@ -92,7 +92,8 @@ EOT
 foreach (@steps)
 {
     # read first line of tooltip file
-    open TF, "../../../examples/step-$_/doc/tooltip";
+    open TF, "../../../examples/step-$_/doc/tooltip"
+       or die "Can't open tooltip file step-$_/doc/tooltip";
     my $tooltip = <TF>;
     close TF;
     chop $tooltip;