diff --git a/Troubleshooting.md b/Troubleshooting.md
index fd09993..bbd0088 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -140,3 +140,7 @@ Mac:
 Windows:
 
 * `%TMP%\EDMarketConnector.log`
+
+**NB: This file is truncated (overwritten from the start) each time you
+run the appication.  So if you encounter an error make a copy of this
+file *immediately*.**