Rename Cells, Nodes on WAS 7

gistfile1.txt

ConnectionsCell01
  ConnectionsCellManager01
  ConnectionsNode01
  ConnectionsNode02

AdminConfig.list('Server')
dmgr(
  cells/ip-10-172-50-218Cell01/
    nodes/ConnectionsCellManager01/
        servers/dmgr|server.xml#Server_1
)\n
nodeagent(
  cells/ip-10-172-50-218Cell01/
    nodes/ip-10-172-50-218Node01/
      servers/nodeagent|server.xml#Server_1120677326772
)\n
server1(
  cells/ip-10-172-50-218Cell01/
    nodes/ip-10-172-50-218Node01/
      servers/server1|server.xml#Server_1364365768995)'

AdminConfig.list('Cell')
'ip-10-172-50-218Cell01(
  cells/ip-10-172-50-218Cell01|
  cell.xml#Cell_1
)'

# Rename Cell
AdminTask.renameCell('[-newCellName ConnectionsCell01 -regenCerts true -nodeName ConnectionsCellManager01 -hostName connections.sugarcrmdemo.com]')

# Rename Nodes
AdminTask.renameNode('[-nodeName ip-10-172-50-218CellManager01 -newNodeName ConnectionsCellManager01]')
AdminTask.renameNode('[-nodeName ip-10-172-50-218Node01 -newNodeName ConnectionsNode01]')


/ibm/was/AppServer/profiles/Dmgr01/config/cells/ip-10-172-50-218Cell01/nodes/ip-10-172-50-218CellManager01/servers/dmgr/server.xml
/ibm/was/AppServer/profiles/Dmgr01/config/cells/ConnectionsCell01/

AdminConfig.list('Node')
# '
ConnectionsCellManager01(
  cells/ip-10-172-50-218Cell01/nodes/ConnectionsCellManager01|
  node.xml#Node_1
)\n
ip-10-172-50-218Node01(
  cells/ip-10-172-50-218Cell01/nodes/ip-10-172-50-218Node01|
  node.xml#Node_1
)'


AdminTask.renameNode('[-nodeName ip-10-172-50-218CellManager01 -newNodeName ConnectionsCellManager01]')
AdminTask.changeHostName('-hostName connectionsCell01 -nodeName ConnectionsCellManager01')

The command renameNode fail. Can you help me ?

wsadmin>AdminTask.renameNode('[-nodeName WEBHTTP1.it-node -newNodeName httpNode -shortName httpNode ]')
WASX7015E: Exception running command: "AdminTask.renameNode('[-nodeName WEBHTTP1.it-node -newNodeName httpNode -shortName httpNode ]')"; exception information:
com.ibm.websphere.management.cmdframework.CommandException
java.lang.ArrayIndexOutOfBoundsException: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0