diff --git a/TestON/tests/SCPF/SCPFscaleTopo/dependencies/topo.py b/TestON/tests/SCPF/SCPFscaleTopo/dependencies/topo.py
index 74f8751..c5c1f88 100644
--- a/TestON/tests/SCPF/SCPFscaleTopo/dependencies/topo.py
+++ b/TestON/tests/SCPF/SCPFscaleTopo/dependencies/topo.py
@@ -43,7 +43,7 @@
         main.Mininet1.arping( srcHost=hostList, dstHost="10.0.0.1", output=main.FALSE, noResult=True )
     try:
         summaryStr = ""
-        summaryStr = json.loads( main.CLIs[0].summary().encode() )
+        summaryStr = json.loads( main.Cluster.active( 0 ).CLI.summary().encode() )
         hostNum = summaryStr.get( 'hosts' )
 
     except (TypeError, ValueError):