diff --git a/example_help_files/canlab_help_3_voxelwise_t_test_walkthrough.m b/example_help_files/canlab_help_3_voxelwise_t_test_walkthrough.m
index 06002e4..c3658b4 100644
--- a/example_help_files/canlab_help_3_voxelwise_t_test_walkthrough.m
+++ b/example_help_files/canlab_help_3_voxelwise_t_test_walkthrough.m
@@ -137,10 +137,12 @@
 % get t-statistics for all voxels. 
 
 t.fullpath = fullfile(pwd, 'example_t_image.nii');
-write(t)
+write(t, 'overwrite')
 
 % If we use the 'thresh' option, we'll write thresholded values:
-write(t, 'thresh')
+% (write() does not overwrite an existing file unless asked, and we just
+% wrote this path above, so pass 'overwrite' here too.)
+write(t, 'thresh', 'overwrite')
 
 t_reloaded = statistic_image(t.fullpath, 'type', 'generic');
 orthviews(t_reloaded)
diff --git a/example_help_files/canlab_help_4b_3D_visualization.m b/example_help_files/canlab_help_4b_3D_visualization.m
index 26c8f5b..ad99f6b 100644
--- a/example_help_files/canlab_help_4b_3D_visualization.m
+++ b/example_help_files/canlab_help_4b_3D_visualization.m
@@ -27,7 +27,7 @@
 [test_images, names] = load_image_set('kragel18_alldata', 'noverbose');
 
 % This field contains a table object with metadata for each image:
-metadata = test_images.dat_descrip;
+metadata = test_images.metadata_table;
 metadata(1:5, :)                        % Show the first 5 rows
 
 % Here are the 3 domains: