Why the error in one, but not the other

Why does this code Generate the error:
Complex object types cannot be converted to simple values.
The expression has requested a variable or an intermediate
expression result
as a simple value, however, the result cannot be converted to
a simple
value. Simple values are strings, numbers, boolean values,
and date/time
values. Queries, arrays, and COM objects are examples of
complex values.
The most likely cause of the error is that you are trying to
use a complex
value as a simple one. For example, you might be trying to
use a query
variable in a <CFIF> tag. This was possible in
ColdFusion 2.0 but creates an
error in later versions.
The error occurred in
C:\Inetpub\wwwroot\2onboard\kBookList.cfm: line 40
38 : <tr>
39 : <td colspan="6">
40 : <cfif showList IS NOT "yearly"><a class="nav"
href=""> Yearly  </a>  </cfif>
41 : <cfif showList IS NOT "complete"><a class="nav"
href=""> Complete  </a>  </cfif>
42 : <cfif showList IS NOT "wish"><a class="nav"
href=""> Wish
List  </a>  </cfif>
CODE.........
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1" />
<title>2onboard.com - Kevin's Korner - Book
List</title>

<cfparam name="showList" default="complete">
<cfparam name="showOrder" default="title">
<cfparam name="showStatus" default="own">

<cfquery name="showList" datasource="2onboard">
SELECT
title,author,status,completed,pages,queue,rating,cover,series,book,link
FROM books
WHERE status = '#showStatus#'
ORDER BY '#showOrder#'
</cfquery>
</head>
<body>
<div id="container"> 
<cfinclude template="header.cfm"> 
<cfinclude template="explanation.cfm"> 
<div class="raised"> 
<b class="top"><b class="b1"></b><b
class="b2"></b><b class="b3"></b><b
class="b4"></b></b>
<div class="boxcontent">
<div class="boxcontenttext">
<table cellspacing="0">
<tr>
<td><span class="title">Kevin's
Korner</span><b> - Reading</b></td>
<td colspan="5"
align="right"><cfoutput> Library contains
<b>#showList.recordCount#</b>
books</cfoutput></td>
</tr>
<tr><td colspan="6"><span
class="spacetext"> </span></td></tr>
<tr>
<td colspan="6">
<cfif showList IS NOT "yearly"><a class="nav"
href=""> Yearly  </a>  </cfif>
<cfif showList IS NOT "complete"><a class="nav"
href=""> Complete  </a>  </cfif>
<cfif showList IS NOT "wish"><a class="nav"
href=""> Wish
List  </a>  </cfif>
</td>
CODE CONTINUES ON FROM HERE….
BUT, if I take just the bare minimum and test it as the
following, it works fine - WHY?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml">
<cfparam name="showList" default="complete">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1" />
<title> </title>
</head>
<body>
<cfif showList IS NOT "yearly"><a class="nav"
href=""> Yearly  </a>  </cfif>
<cfif showList IS NOT "complete"><a class="nav"
href=""> Complete  </a>  </cfif>
<cfif showList IS NOT "wish"><a class="nav"
href=""> Wish
List  </a>  </cfif>
</body>

> <cfparam name="showList" default="complete">
This line creates showList as a simple string variable
containing
"complete".
> <cfquery name="showList" datasource="2onboard">
This line redefines showList as a recordset containing the
data returned
from the database which is not a simple variable and can not
be accessed
with code such as <cfoutput>#showList#</cfoutput>
> <cfparam name="showList" default="complete">
This line does NOT redefine showList back to a simple string
because a
<cfparam ...> only fires if the variable does not
exist. The previous
two lines would create the variable, thus it exists.
jkgiven wrote:
> Why does this code Generate the error:
>
> Complex object types cannot be converted to simple
values.
>
> The expression has requested a variable or an
intermediate expression result
> as a simple value, however, the result cannot be
converted to a simple
> value. Simple values are strings, numbers, boolean
values, and date/time
> values. Queries, arrays, and COM objects are examples of
complex values.
>
> The most likely cause of the error is that you are
trying to use a complex
> value as a simple one. For example, you might be trying
to use a query
> variable in a <CFIF> tag. This was possible in
ColdFusion 2.0 but creates an
> error in later versions.
>
> The error occurred in
C:\Inetpub\wwwroot\2onboard\kBookList.cfm: line 40
>
> 38 : <tr>
> 39 : <td colspan="6">
> 40 : <cfif showList IS NOT "yearly"><a
class="nav"
>
href=""> Yearly  </a>  </cfif>
> 41 : <cfif showList IS NOT "complete"><a
class="nav"
>
href=""> Complete  </a>  </cfif>
> 42 : <cfif showList IS NOT "wish"><a
class="nav" href=""> Wish
>
List  </a>  </cfif>
>
>
> CODE.........
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN"
> "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
> <html xmlns="
http://www.w3.org/1999/xhtml">
> <head>
> <meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1" />
> <title>2onboard.com - Kevin's Korner - Book
List</title>
>
> 
> <cfparam name="showList" default="complete">
> <cfparam name="showOrder" default="title">
> <cfparam name="showStatus" default="own">
>
> 
> <cfquery name="showList" datasource="2onboard">
> SELECT
title,author,status,completed,pages,queue,rating,cover,series,book,link
> FROM books
> WHERE status = '#showStatus#'
> ORDER BY '#showOrder#'
> </cfquery>
>
> </head>
>
> <body>
>
> <div id="container"> 
> <cfinclude template="header.cfm"> 
> <cfinclude template="explanation.cfm"> 
>
> <div class="raised"> 
> <b class="top"><b class="b1"><b
class="b2"><b class="b3"><b
> class="b4">
> <div class="boxcontent">
> <div class="boxcontenttext">
> <table cellspacing="0">
> <tr>
> <td><span class="title">Kevin's
Korner</span>
- Reading</td>
> <td colspan="5"
align="right"><cfoutput> Library contains
>
#showList.recordCount# books</cfoutput></td>
> </tr>
> <tr><td colspan="6"><span
class="spacetext"> </span></td></tr>
> <tr>
> <td colspan="6">
> <cfif showList IS NOT "yearly"><a class="nav"
>
href=""> Yearly  </a>  </cfif>
> <cfif showList IS NOT "complete"><a class="nav"
>
href=""> Complete  </a>  </cfif>
> <cfif showList IS NOT "wish"><a class="nav"
href=""> Wish
>
List  </a>  </cfif>
> </td>
>
> CODE CONTINUES ON FROM HERE?.
>
> BUT, if I take just the bare minimum and test it as the
following, it works
> fine - WHY?
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN"
> "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
> <html xmlns="
http://www.w3.org/1999/xhtml">
>
> <cfparam name="showList" default="complete">
>
> <head>
> <meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1" />
> <title> </title>
> </head>
>
> <body>
>
> <cfif showList IS NOT "yearly"><a class="nav"
>
href=""> Yearly  </a>  </cfif>
> <cfif showList IS NOT "complete"><a class="nav"
>
href=""> Complete  </a>  </cfif>
> <cfif showList IS NOT "wish"><a class="nav"
href=""> Wish
>
List  </a>  </cfif>
>
> </body>
>
>
>

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Why the error in one, but not the other

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