An error occurs when you try to save a document created with Microsoft Word XP and imported it into the ITP/MDK Repository. This error only occurs when a security/privacy feature Store random number to improve merge accuracy was enabled when the document was created. This feature can be found under Options in the Tools menu, Security tab (see figure).

When this feature is set a random number is inserted in every new document created. This means that unchecking this feature has no effect on existing documents.
A document made with this feature enabled can be imported in the ITP/MDK Repository, it's only if it is edited and saved that an error occurs:

When this error is encountered the remedy is to open the document from the file system in Microsoft Word. Save it as HTML, reopen and save as doc. Make sure that Store random number… is switched off when the HTML file is opened to be saved as a Microsoft Word file.
The document still needs to be (re-) imported. We recommend deleting the old document, which cannot be used in the ITP/MDK Repository, before (re) importing the cleaned document.
If you have created a batch of documents with Store random number checked, the Microsoft Word macro has presented below might be useful