You might want to try something like this:
<cfcomponent>
<cfset variables.ncid = 0> <!--- called when CFC is created --->
<cffunction name="checkNCID" access="public" output="false">
<cfargument name="NCID" required="no"
default="#variables.ncid#">
<cfset var id = 0 /><!--- var the ID so it is local to
this method --->
<cfif arguments.NCID NEQ 0 AND len(argument.NCID)>
<cfset id = arguments.NCID />
</cfif>
<cfreturn ID />
</cffunction>
</cfcomponent>
Calling Page:
<cfinvoke component="NCSelected" method="checkNCID" returnvariable="id">
<cfinvokeargument name="NCID" value="#ncid#" />
</cfinvoke>
HTH,
Rich Kroll
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