ALMA Science Archive: Failed downloads

The ALMA science archive returned some failed downloads for some queries:

```
<html>
<head>
<title>Apache Tomcat/7.0.40 - Error report</title>
<style>
<!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;backgroun
</style> </head>
<body>
<h1>HTTP Status 500 - An exception occured writing the response entity</h1>
<HR size="1" noshade="noshade">
<p>
<b>type</b> Status report</p>
<p>
<b>message</b> <u>An exception occured writing the response entity</u>
</p>
<p>
<b>description</b> <u>The server encountered an internal error that prevented it from fulfilling this request.</u>
</p>
<HR size="1" noshade="noshade">
<h3>Apache Tomcat/7.0.40</h3>
</body>
</html>
```