title: reqPostions() help disconnecting TWS / Interactive brokers / api
body: <p>Here is a sample of how I check for open positions. If no positions exist it creates a txt file  and if open positions exist it del the .txt file. 
  My problem is I don't know how to disconnect it . It is also outputting Error -1 see below script  </p>
  
  <pre class="lang-py prettyprint-override"><code>from ibapi.client import EClient
  from ibapi.wrapper import EWrapper
  from ibapi.common import *
  from ibapi.contract import *
  from ib.opt import ibConnection
  import os.path
  from os import path
  
  
  class CheckPos(EClient, EWrapper):
              def __init__(self):
                  EClient.__init__(self, self)
              def nextValidId(self, orderId:int):
                  self.reqPositions()
              def position(self, account: str, contract: Contract, position: float,
                  avgCost: float):
                  super().position(account, contract, position, avgCost)
  
                  if position &gt;0:
                      try:
                          os.remove("noposition.txt")
  
                      except:
                         print("Open Positons")
  
  
  
                  else:
                      try:
                          open("noposition.txt","w+")
                          print("File Created Sucessfully")
  
                      except:
                          print("No Open Positions")
  
  
  
  
  
  
  
  def main():
      app = CheckPos()
      app.connect("127.0.0.1", 7497,421 )
      app.run()
  
  
  if __name__ == "__main__":
      main()    
  
  </code></pre>
  
  <p>output is 
  ERROR -1 2104 Market data farm connection is OK:usfuture
  ERROR -1 2104 Market data farm connection is OK:usfarm
  ERROR -1 2106 HMDS data farm connection is OK:ushmds
  File Created Sucessfully</p>