I just tried running a strategy I've been using for quite some time, and received the subject error message.  Does anyone know what this means or how to fix it?  I run this strategy in Strategy Monitor every night after the NY close and never have a problem.  I made two condition changes to my exit rules, but the changes were very minor and they were made using the point-and-click rules - I am not writing code/scripts.
    
    
        
    
    
        
    
    
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        Thanks Eugene - it was between two SellAtMarket signals - I don't know why the problem didn't surface before now - I hadn't changed the location.  I removed it and re-entered the "OR" again - within one SellAtMarket - and it works fine now.  Thanks again. 
    
    
        
    
    
        
    
    
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