dynamic graph, but timeline disabled

[gruebleen]

I've been loading a dynamic graph, with no error messages, and the import dialog deems it dynamic. But when it comes to longitudinal exploration, the timeline is disabled on the grounds that the graph is not dynamic. Why could this be?

I've combed through the gexf file (generated by an Applescript processing a wikimedia-like dump from a learning management system) repeatedly to look for anything breaches of the format, and found nothing wrong yet, but I'm posting parts of the file here since it is very likely that I still don't understand it.

The header:

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<?xml version="1.0" encoding="UTF-8"?>
<gexf xmlns="http://www.gexf.net/1.2draft" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.gexf.net/1.2draft 
		http://www.gexf.net/1.2draft/gexf.xsd"
	version="1.2"> 
<meta lastmodifieddate="2014-04-23">
<creator>Class wiki parser script</creator>
<description>Class wiki</description> 
</meta>

Graph declaration:

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<graph defaultedgetype="directed" timeformat="dateTime" mode="dynamic">

<attributes class="node" mode="dynamic">
	<attribute id="0" title="Size" type="integer" />
	<attribute id="1" title="Title" type="string" />
	<attribute id="2" title="Author" type="string" />
</attributes>
<attributes class="edge" mode="dynamic">
</attributes>

A node:

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	<node id="3e197e6b0977418b9f79f4d458c767a2" label="Plato" start="2013-09-15T15:28:29">
		<attvalues>
			<attvalue for ="0" value = "186" start="2013-09-15T15:28:29"/>
				<attvalue for ="1" value = "Plato" start="2013-09-15T15:28:29"/>
				<attvalue for ="2" value = "_228387_1" start="2013-09-15T15:28:29"/>
				<attvalue for ="0" value = "200" start="2013-09-15T15:30:25"/>
				<attvalue for ="1" value = "-" start="2013-09-15T15:30:25"/>
				<attvalue for ="2" value = "_228387_1" start="2013-09-15T15:30:25"/>
				</attvalues>
	</node>

An edge:

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	<edge id="67" source="1009946b7945472dacb95cf0ea0effef" target="f2d8b82298314fbeb1341f08f7d8423f" start="2013-12-12T09:58:09"/>

[gruebleen]

I just poked around a bit further in the data laboratory, and see that all of the node attributes have time intervals associated with them as expected. The edges also have time intervals assigned. So Gephi seems to be doing perfectly fine with being given only start times, and deducing the end times for itself.

But it still says, "Timeline disabled. The graph is not dynamic."

[gruebleen]

Today I discovered that, by restarting Gephi, sometimes I'll get lucky and the timeline will work. For now, I can just restart over and over until I get what I want. Looking ahead to the longer term, though, what information should be reported for the developers' benefit?