error - schema element declaration

[karawarburton]

A student of mine is getting this message (French interface):
Impossible de trouver la déclaration de l'élément Schéma
In English this translates to:
Cannot find Schema element declaration.
Can you help us resolve this error message? It only appears on her computer and Oxygen installation, it does not appear on my computer and Oxygen installation (its the same version).
I could not attach the file, this system does not accept xml files (??). The contents of the file is copied below. We have named it with the .xml extension (I am not sure if that makes a difference, they are DITA files.)
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Code: Select all

<?xml version="1.0"?>
<!DOCTYPE task PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">
<!-- Created with XMetaL (http://www.xmetal.com) -->
<task id="task_37459b9f1fbb40babea84490a924b9fa"> 
  <title>Référence</title> 
  <shortdesc><?xm-replace_text Short Description?>
  </shortdesc> 
  <taskbody> 
	 <steps id="steps_3a2c685aa1874f25a4c40597f7cdfb54"> 
		<step id="step_a7593eaa76c04d01abe1fba6c0c9ccef">
		  <cmd><?xm-replace_text Step?>
		  </cmd> 
		</step> 
	 </steps> 
  </taskbody> 
</task>

[Radu]

Hi,
The file looks valid to me.
Maybe your particular student could open the Oxygen Preferences dialog, go to the "DITA" preferences page and use the "Restore Defaults" button.
Maybe they could also go to the "Document Type Association" and "Document Type Association / Locations", press "Restore Defaults" then save and close the Preferences dialog, then re-open the topic.
Regards,
Radu