[xsl] XPL file

Subject: [xsl] XPL file
From: Mark Wilson <mark@xxxxxxxxxxxx>
Date: Sat, 15 Dec 2012 06:45:29 -0700
I have tried to get an answer elsewhere and have not. I don't think this is off-topic, but if it is, I am sorry. I am trying to learn XProc to get away from using windows batch files and have started with Robert Costello's XProc tutorial which I am trying to run in Oxygen, but the very first example refuses to run. What's wrong?

The below XPL file gives me this Calabash error:
E [Calabash XProc] XE0001 : Unreadable port: result on MyStore

<?xml version="1.0" encoding="UTF-8"?>
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"; xmlns:c="http://www.w3.org/ns/xproc-step"; version="1.0">
<p:input port="source">
<p:document href="BookStore.xml"/>
<p:output port="result">
<p:pipe port="result" step="MyStore"/>
<p:rename match="BookStore/Book/Date" new-name="Year"/>
<p:store href="test.xml" name="myStore"/>

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