How can I recover a zargo file?

Hello!

I did some modifs on a diagram... i believe the last one was to add a note on an
association class. Then saved the file, and closed it (actually tried to export
the graphic for the diagram, but got a zero size image file, so i chose to try
and close the file and open it again...).

However, when I try to re-open I get the exception below.

Is there any way I can recover the file (size is 48Kb) please ?!?
My last backup goes waaay back!!!!

Thanks in advance!!

mario

Error opening file : marp.zargo System Info:
ArgoUML version : 0.24
Java Version : 1.6.0
Java Vendor : Sun Microsystems Inc.
Java Vendor URL : http://java.sun.com/
Java Home Directory : C:\Program Files\Java\jre1.6.0
Java Classpath : C:\ArgoUML\argouml.jar
Operation System : Windows 2000, Version 5.0
Architecture : x86
User Name : Ruggier
User Home Directory : C:\Documents and Settings\Ruggier
Current Directory : C:\ArgoUML
JVM Total Memory : 18436096
JVM Free Memory : 3888112


 Error occurred at : Wed Apr 18 17:32:53 CEST 2007
Cause : java.lang.IllegalArgumentException: An annotated element must be
supplied
at
org.argouml.uml.diagram.static_structure.ui.CommentEdge.setAnnotatedElement(CommentEdge.java:166)
at
org.argouml.uml.diagram.static_structure.ui.FigEdgeNote.setDestFigNode(FigEdgeNote.java:328)
at org.argouml.persistence.PGMLStackParser.attachEdges(PGMLStackParser.java:336)
at org.argouml.persistence.PGMLStackParser.readDiagram(PGMLStackParser.java:283)
at
org.argouml.persistence.DiagramMemberFilePersister.load(DiagramMemberFilePersister.java:67)
at org.argouml.persistence.UmlFilePersister.doLoad(UmlFilePersister.java:371)
at
org.argouml.persistence.ZargoFilePersister.doLoad(ZargoFilePersister.java:323)
at org.argouml.ui.ProjectBrowser.loadProject(ProjectBrowser.java:1479)
at org.argouml.application.Main.main(Main.java:331)
-------
Full exception : org.argouml.persistence.OpenException:
java.lang.IllegalArgumentException: An annotated element must be supplied
at
org.argouml.persistence.DiagramMemberFilePersister.load(DiagramMemberFilePersister.java:74)
at org.argouml.persistence.UmlFilePersister.doLoad(UmlFilePersister.java:371)
at
org.argouml.persistence.ZargoFilePersister.doLoad(ZargoFilePersister.java:323)
at org.argouml.ui.ProjectBrowser.loadProject(ProjectBrowser.java:1479)
at org.argouml.application.Main.main(Main.java:331)
Caused by: java.lang.IllegalArgumentException: An annotated element must be
supplied
at
org.argouml.uml.diagram.static_structure.ui.CommentEdge.setAnnotatedElement(CommentEdge.java:166)
at
org.argouml.uml.diagram.static_structure.ui.FigEdgeNote.setDestFigNode(FigEdgeNote.java:328)
at org.argouml.persistence.PGMLStackParser.attachEdges(PGMLStackParser.java:336)
at org.argouml.persistence.PGMLStackParser.readDiagram(PGMLStackParser.java:283)
at
org.argouml.persistence.DiagramMemberFilePersister.load(DiagramMemberFilePersister.java:67)
... 4 more