1 files changed, 1 insertions, 0 deletions
diff --git a/init.lua b/init.lua
index b6c91d6..200bed3 100755
--- a/init.lua
+++ b/init.lua
@@ -51,6 +51,7 @@ function pipeworks.fix_image_names(table, replacement)
 end
 
 function pipeworks.add_node_box(t, b)
+	if not t or not b then return end
 	for i in ipairs(b)
 		do table.insert(t, b[i])
 	end