diff --git a/tools/oneclick/gui/unb_gui_commands.py b/tools/oneclick/gui/unb_gui_commands.py
index c3b0cde7fcbedbb3b8a8e4f8f627aa5700d23da6..788562cbc338809193d7e5d96de3e8db8bec67ed 100644
--- a/tools/oneclick/gui/unb_gui_commands.py
+++ b/tools/oneclick/gui/unb_gui_commands.py
@@ -293,7 +293,7 @@ class Commands:
         #flash the rbf file using util_epcs.py
         for lcu in lcu_list:            
             s = self.setcmd('util_epcs.py', lcu)
-            s += ' -n 7'
+            s += ' -n 4'
             if lcu == 'local':
                 s += ' -s %s' % rbf_file
             else:
@@ -433,7 +433,7 @@ class Commands:
         self.print_to_terminal('Start flashing user image\n')           
         for lcu in lcu_list:            
             s = self.setcmd('util_epcs.py', lcu)
-            s += ' -n 7'
+            s += ' -n 4'
             if lcu == 'local':
                 s += ' -s %s' % rbf_file
             else: