Try this.

Right before your first line of generated content (ie your doctype 
declaration), insert this code:

<cfscript>
getPageContext().getOut().clearBuffer();
</cfscript>

That will flush all the output up to that point, and effectively mark the 
starting point of what content gets sent to the browser.

> Hi
> I'm developing an application. in the application.cfm file included 
> _constant.cfm file which configures the site constants. In the default.
> cfm file there is a switch case to include header,body and footer 
> based on the query string.
> In the rendered code, i'm getting lots of blank line just before the 
> starting html tag.
> 
> How can i remove these extra blank lines?
> 
> please help. thanks in advance.

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