diff --git a/poc-datacollector/modules/ROOT/pages/index.adoc b/poc-datacollector/modules/ROOT/pages/index.adoc
index f0db8e7..ab6ff13 100644
--- a/poc-datacollector/modules/ROOT/pages/index.adoc
+++ b/poc-datacollector/modules/ROOT/pages/index.adoc
@@ -37,6 +37,23 @@ TIP: You can find more information http://docs.swarmlab.io/SwarmLab-HowTos/swarm
 
 NOTE: You may have to wait (couple of minutes) for the system to fully provision resources. You may have to refresh the web interface a couple of times!
 
+[NOTE]
+====
+on Error:
+
+[source,bash]
+----
+UnixHTTPConnectionPool(host='localhost', port=None): Read timed out. (read timeout=60)
+----
+Run:
+
+[source,bash]
+----
+export DOCKER_CLIENT_TIMEOUT=120
+export COMPOSE_HTTP_TIMEOUT=120 
+----
+====
+
 === Open web interface
 
 Find "webclient" Instance from menou: