diff --git a/README.md b/README.md
index ee7d48c..fbfd8a1 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,23 @@ server {
 }
 ```
 
+## trooble shooting
+
+/srv/basex has bad owner : 1000:users instead of basex:basex (1948:1984) (WHY ??)
+```
+ docker exec -u 0 -it gdp-basex-1 sh
+ chown -R basex:basex /srv/basex
+```
+
+gdp-entrypoint is never launched, "launchit by hand" (WHY ??)
+```
+ docker exec -it gdp-basex-1 sh
+ . /usr/local/bin/gdp-entrypoint.sh
+```
+
+
+
+
 ## Doc
 
 https://github.com/guidesDeParis/webapp/blob/master/install.md