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 TJ, 
  
Yes, I had put AddColumn() in a 
conditional statement.  
  
All clear now 
  
Thanks 
  
  ----- Original Message -----  
  
  
  Sent: Friday, March 31, 2006 1:15 
AM 
  Subject: Re: [amibroker] Explorations - 
  AB version 4.79 
  
  
  Hello, 
    
  NumColumns is NOT needed if you use AddColumn (it manages it 
  internally). 
  I guess the error is elsewhere (do you put AddColumn part in 
  some conditional statement ??) 
  Anyway in order to help you, full formula is needed (you can 
  send it to support) 
    
   Best regards, Tomasz Janeczko amibroker.com 
  
    ----- Original Message -----  
    
    
    Sent: Friday, March 31, 2006 3:58 
    AM 
    Subject: [amibroker] Explorations - AB 
    version 4.79 
    
  
    When I start an exploration I get an error 
    message: 
      
    "You Need to deffine NumColumns 
    Variable" 
      
    This code was working previously. A few  
    other codes have the same problem and some others work fine. 
    NumColumns requirement was outmoded long time 
    ago!!! 
      
    I tried using NumColumns = 7; ....  but no 
    help. 
      
    Thanks 
    =============================================================================== 
      
    Here is the code I use. 
    
    Filter  = BuyFilter==1 OR ShortFilter==1;
    AddColumn (Close,"Close"); 
    AddColumn (AvgVol,"AvgVol"); 
    AddColumn ( IIf( Buy_CCIMACD==1, 66, IIf(Short_CCIMACD==1, 83, 88 )), "B/S", 
    formatChar ); 
    AddColumn (Issue_RS,"Issue RS"); 
    AddColumn (Industry_RS,"Ind RS");
    AddColumn (ShtRatio,"%Short"); 
    AddColumn (TradeQnty,"Tr Qnt");    
  
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