diff --git a/bt5/erp5_open_trade/SkinTemplateItem/portal_skins/erp5_open_trade/Alarm_updateOpenOrderSimulation.xml b/bt5/erp5_open_trade/SkinTemplateItem/portal_skins/erp5_open_trade/Alarm_updateOpenOrderSimulation.xml
index b63555ae0855dc96c22a6c9dbec2651c27d697ad..74f6188a9941a89c8643da6c70a18ad28597c154 100644
--- a/bt5/erp5_open_trade/SkinTemplateItem/portal_skins/erp5_open_trade/Alarm_updateOpenOrderSimulation.xml
+++ b/bt5/erp5_open_trade/SkinTemplateItem/portal_skins/erp5_open_trade/Alarm_updateOpenOrderSimulation.xml
@@ -53,6 +53,8 @@
             <value> <string encoding="cdata"><![CDATA[
 
 kw = {}\n
+if params is None:\n
+  params = {}\n
 \n
 last_active_process = context.getLastActiveProcess()\n
 \n
diff --git a/bt5/erp5_open_trade/bt/revision b/bt5/erp5_open_trade/bt/revision
index 3fbd193e4a2dea8bb1d580e5bab0e1e586ee8686..e3b5acb83455926f7a928b8ab4de46bfdb4605bd 100644
--- a/bt5/erp5_open_trade/bt/revision
+++ b/bt5/erp5_open_trade/bt/revision
@@ -1 +1 @@
-106
\ No newline at end of file
+107
\ No newline at end of file