Exception when generating Visio diagram. Refer to the log file for details

Exception when generating Visio diagram. Refer to the log file for details

Good morning to you all.
With version 9.0.9011 and MS-Visio 2007 I was trying to import the map in XML format but I received the error message "Exception when generating Visio diagram. Refer to the log file for details"
Can you help?

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