diff --git a/Error-messages.md b/Error-messages.md
index e443e2e..d4d7319 100644
--- a/Error-messages.md
+++ b/Error-messages.md
@@ -2,6 +2,7 @@ The most frequent reasons of errors.
 
 ### Failed to prepare a workspace
 * Source files or directories use too long names.
+* Third party application is blocking KCC temporary files in some way.
 
 ### Source directory is empty
 * Selected directory don't contain any image files.