Error

An error occurred processing this request: in code:
( generate-html "guest" "1907" #( ( page . "WebPage" ) ( state . "3030347061676530303757656250616765303032696430303431393037" ) ( id . "1907" ) ) )

in code:
( let ( ( html "" ) ) ( define html ( string-append html "<!-- Default template for articles -->

<!-- All code enclosed within the symbols "" ) ) " and " ( define html ( string-append html "" is SCHEME code.
Comment lines within SCHEME code begin with ";"
The following comments should help users understand how the SCHEME
code is used in this template.
WARNING: Errors in this template can result in the front page being
rendered incorrectly. If you make changes, proceed with caution. -->

<!-- these tags enclose comments within HTML code -->

<!-- Get the article id from the database -->
" ) ) ( define obj ( get "guest" id ) ) ( define html ( string-append html "

<!-- Begin HTML -->
<html>

<!-- Header section -->
<head>

<!-- JPA added. Define page break -->
<STYLE TYPE="text/css">
p.breakhere {page-break-before: always}
</STYLE>
<!-- insert <p class="breakhere"> to
force page break -->

<!-- Get the article's title and put it here -->
<title>" ( env-lookup obj 'name ) "</title>
</head>

<!-- Body section -->
<body bgcolor=#ffffff link="#006666" vlink="#003300" text="#333333">

<!-- Start a table -->
<table border=1 cellspacing=0 align=center cellpadding=10>

<!-- Start a table row -->
<tr align=center>

<!-- a cell of table data -->
<td valign=center>
<br>
<h2><i>
<!-- Get the section name and put it here, and make it a link to the section -->
<a href=" ( generate-href ( env-lookup obj 'parent ) ) ">
" ( env-lookup ( get "guest" ( env-lookup obj 'parent ) ) 'name ) "
</i></h2></a>
</td>

<!-- a cell of table data -->
<td>
<!-- generate an href for the masthead image and make it a link to the front page -->
<a href=" ( generate-href "root" ) " border=0>
<img src=" ( generate-href "2028" ) " border=0></a>
</td>
</tr>
</table>

<!-- a "division" of the page, aligned left -->
<div align="left">
<h2>
<!-- Get the article's title and put it here -->
" ( env-lookup obj 'name ) "</h2>
<p>
<b><i>
<!-- Get the article's summary and put it here -->
" ( convert-to-html ( env-lookup obj 'summary ) ) "
</i></b>
<p>
<!-- Get the article's author and put a link to her personal page here -->
<i><a href=" ( generate-href ( env-lookup obj 'author-id ) ) ">" ( env-lookup obj 'author ) "</a></i>
</p>
</div>

<!-- another "division", aligned right -->
<div align=right>

<!-- Start a table, that's 80% of the width of the page -->
<table width="80%">

<!-- Start a table row -->
<tr>

<!-- a cell of table data -->
<td valign=top>

<!-- Get the text of the article, convert it to HTML, and put it here -->
" ( convert-to-html ( env-lookup obj 'body ) ) "
<p>
</td>
</table>
</div>

<p>
<hr>
<!-- start google search code -->
<div align=center><font color=blue><i><b>You can search below for any word or words in all issues of the Melrose Mirror.</b></i></font></div>
<div id="cse" style="width: 100%;">Loading</div>
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
google.load('search', '1', {language : 'en'});
google.setOnLoadCallback(function() {
var customSearchControl = new google.search.CustomSearchControl('016215002896103307345:poiq_is3sjy');
customSearchControl.setResultSetSize(google.search.Search.FILTERED_CSE_RESULTSET);
customSearchControl.draw('cse');
}, true);
</script>
<link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
<!-- end google search code -->

<div align=center>
<b>
<!-- Get the article's section and put a link here -->
| <a href=" ( generate-href ( env-lookup obj 'parent ) ) ">Return to section</a> |

<!--Generate a link to the Front Page here -->
<a href=" ( generate-href "root" ) ">The Front Page</a> |

<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu">Write to us</A> |
</b>
<p>
<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu"><img src=" ( generate-href "262" ) " hspace=5 alt="Write to us"></A><P>

</div>
<!-- Start of Google Analytics counter code: JPA, 2/11/09 -->

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2778190-1";
urchinTracker();
</script>

</body>
</html>" ) ) html )

in code:
( define html ( string-append html "

<!-- Begin HTML -->
<html>

<!-- Header section -->
<head>

<!-- JPA added. Define page break -->
<STYLE TYPE="text/css">
p.breakhere {page-break-before: always}
</STYLE>
<!-- insert <p class="breakhere"> to
force page break -->

<!-- Get the article's title and put it here -->
<title>" ( env-lookup obj 'name ) "</title>
</head>

<!-- Body section -->
<body bgcolor=#ffffff link="#006666" vlink="#003300" text="#333333">

<!-- Start a table -->
<table border=1 cellspacing=0 align=center cellpadding=10>

<!-- Start a table row -->
<tr align=center>

<!-- a cell of table data -->
<td valign=center>
<br>
<h2><i>
<!-- Get the section name and put it here, and make it a link to the section -->
<a href=" ( generate-href ( env-lookup obj 'parent ) ) ">
" ( env-lookup ( get "guest" ( env-lookup obj 'parent ) ) 'name ) "
</i></h2></a>
</td>

<!-- a cell of table data -->
<td>
<!-- generate an href for the masthead image and make it a link to the front page -->
<a href=" ( generate-href "root" ) " border=0>
<img src=" ( generate-href "2028" ) " border=0></a>
</td>
</tr>
</table>

<!-- a "division" of the page, aligned left -->
<div align="left">
<h2>
<!-- Get the article's title and put it here -->
" ( env-lookup obj 'name ) "</h2>
<p>
<b><i>
<!-- Get the article's summary and put it here -->
" ( convert-to-html ( env-lookup obj 'summary ) ) "
</i></b>
<p>
<!-- Get the article's author and put a link to her personal page here -->
<i><a href=" ( generate-href ( env-lookup obj 'author-id ) ) ">" ( env-lookup obj 'author ) "</a></i>
</p>
</div>

<!-- another "division", aligned right -->
<div align=right>

<!-- Start a table, that's 80% of the width of the page -->
<table width="80%">

<!-- Start a table row -->
<tr>

<!-- a cell of table data -->
<td valign=top>

<!-- Get the text of the article, convert it to HTML, and put it here -->
" ( convert-to-html ( env-lookup obj 'body ) ) "
<p>
</td>
</table>
</div>

<p>
<hr>
<!-- start google search code -->
<div align=center><font color=blue><i><b>You can search below for any word or words in all issues of the Melrose Mirror.</b></i></font></div>
<div id="cse" style="width: 100%;">Loading</div>
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
google.load('search', '1', {language : 'en'});
google.setOnLoadCallback(function() {
var customSearchControl = new google.search.CustomSearchControl('016215002896103307345:poiq_is3sjy');
customSearchControl.setResultSetSize(google.search.Search.FILTERED_CSE_RESULTSET);
customSearchControl.draw('cse');
}, true);
</script>
<link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
<!-- end google search code -->

<div align=center>
<b>
<!-- Get the article's section and put a link here -->
| <a href=" ( generate-href ( env-lookup obj 'parent ) ) ">Return to section</a> |

<!--Generate a link to the Front Page here -->
<a href=" ( generate-href "root" ) ">The Front Page</a> |

<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu">Write to us</A> |
</b>
<p>
<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu"><img src=" ( generate-href "262" ) " hspace=5 alt="Write to us"></A><P>

</div>
<!-- Start of Google Analytics counter code: JPA, 2/11/09 -->

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2778190-1";
urchinTracker();
</script>

</body>
</html>" ) )

in code:
( string-append html "

<!-- Begin HTML -->
<html>

<!-- Header section -->
<head>

<!-- JPA added. Define page break -->
<STYLE TYPE="text/css">
p.breakhere {page-break-before: always}
</STYLE>
<!-- insert <p class="breakhere"> to
force page break -->

<!-- Get the article's title and put it here -->
<title>" ( env-lookup obj 'name ) "</title>
</head>

<!-- Body section -->
<body bgcolor=#ffffff link="#006666" vlink="#003300" text="#333333">

<!-- Start a table -->
<table border=1 cellspacing=0 align=center cellpadding=10>

<!-- Start a table row -->
<tr align=center>

<!-- a cell of table data -->
<td valign=center>
<br>
<h2><i>
<!-- Get the section name and put it here, and make it a link to the section -->
<a href=" ( generate-href ( env-lookup obj 'parent ) ) ">
" ( env-lookup ( get "guest" ( env-lookup obj 'parent ) ) 'name ) "
</i></h2></a>
</td>

<!-- a cell of table data -->
<td>
<!-- generate an href for the masthead image and make it a link to the front page -->
<a href=" ( generate-href "root" ) " border=0>
<img src=" ( generate-href "2028" ) " border=0></a>
</td>
</tr>
</table>

<!-- a "division" of the page, aligned left -->
<div align="left">
<h2>
<!-- Get the article's title and put it here -->
" ( env-lookup obj 'name ) "</h2>
<p>
<b><i>
<!-- Get the article's summary and put it here -->
" ( convert-to-html ( env-lookup obj 'summary ) ) "
</i></b>
<p>
<!-- Get the article's author and put a link to her personal page here -->
<i><a href=" ( generate-href ( env-lookup obj 'author-id ) ) ">" ( env-lookup obj 'author ) "</a></i>
</p>
</div>

<!-- another "division", aligned right -->
<div align=right>

<!-- Start a table, that's 80% of the width of the page -->
<table width="80%">

<!-- Start a table row -->
<tr>

<!-- a cell of table data -->
<td valign=top>

<!-- Get the text of the article, convert it to HTML, and put it here -->
" ( convert-to-html ( env-lookup obj 'body ) ) "
<p>
</td>
</table>
</div>

<p>
<hr>
<!-- start google search code -->
<div align=center><font color=blue><i><b>You can search below for any word or words in all issues of the Melrose Mirror.</b></i></font></div>
<div id="cse" style="width: 100%;">Loading</div>
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
google.load('search', '1', {language : 'en'});
google.setOnLoadCallback(function() {
var customSearchControl = new google.search.CustomSearchControl('016215002896103307345:poiq_is3sjy');
customSearchControl.setResultSetSize(google.search.Search.FILTERED_CSE_RESULTSET);
customSearchControl.draw('cse');
}, true);
</script>
<link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
<!-- end google search code -->

<div align=center>
<b>
<!-- Get the article's section and put a link here -->
| <a href=" ( generate-href ( env-lookup obj 'parent ) ) ">Return to section</a> |

<!--Generate a link to the Front Page here -->
<a href=" ( generate-href "root" ) ">The Front Page</a> |

<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu">Write to us</A> |
</b>
<p>
<!--Generate a mail link for feedback -->
<A HREF="mailto:melrose@media.mit.edu"><img src=" ( generate-href "262" ) " hspace=5 alt="Write to us"></A><P>

</div>
<!-- Start of Google Analytics counter code: JPA, 2/11/09 -->

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2778190-1";
urchinTracker();
</script>

</body>
</html>" )

in code:
( generate-href ( env-lookup obj 'parent ) )

Type mismatch