Hi,

I have a similar problem.
When I try running ProM from Eclipse, I got the same message too:

Exception in thread "main" java.lang.NullPointerException
    at org.processmining.contexts.uitopia.UI.main(UI.java:61)

I'm trying it form home, using windows 7, and signed in as the root user.

My C:\Profiles\XXX\UITopia is created is too, and it created uitopiaconfig.xml (but not at the first time). It contains:

<?xml version="1.0" encoding="UTF-8" ?>
<!-- UITopia configuration file. -->
<!-- (c) 2009 by Christian W. Guenther (christian@deckfour.org) -->
<!-- WARNING: Do not manually edit this file, unless you know what you are doing! -->
<configuration timestamp="1299524471609">
    <set name="master">
        <set name="org.processmining.contexts.uitopia.packagemanager.PMFrame">
            <attribute key="window_height" value="750"/>
            <attribute key="window_width" value="1024"/>
            <attribute key="window_x" value="10"/>
            <attribute key="window_y" value="10"/>
        </set>
        <set name="org.processmining.contexts.uitopia.packagemanager.PMMainView">
            <attribute key="activeView" value="WORKSPACE"/>
        </set>
    </set>
</configuration>

Java is configured to use my proxy settings.
Please help me, if you can!

thanks,
  amarant