What is that error mean “expression must be an lvalue or a function designator”

Hi all

       i add  the ZDP_MgmtLeaveRsp（） in the ZDO Msg receive callback。

       but  it shows me  a  error “expression must be an lvalue or a function designator”，

      what is that  mean ？

static void zclTest_ProcessZDOMsgs( zdoIncomingMsg_t *pMsg )
{
   switch (pMsg->clusterID)
  {
   case Mgmt_Leave_req:
        RemoteLeaveReq = TRUE;
        zclEmerButton_BasicResetCB();
        ZDP_MgmtLeaveRsp( pMsg->TransSeq, &pMsg->srcAddr, ZSuccess, pMsg->SecurityUse );
     break;
     
   default:
     break;
  }
}