Microsoft KB Archive/254749

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Visio5: "Unhandled Exception" or "Visio's Add-on Services Encountered an Error" When You Save or Open a Database Model

Article ID: 254749

Article Last Modified on 8/5/2004


  • Visio 5.0 Enterprise

This article was previously published under Q254749


In Visio Enterprise, when you try to save a database model, you may receive one of the following error messages:

Unhandled Exception.

Unspecified Error.

If you then close the file and try to open it again, you receive the following error message:

Visio's add-on services encountered an error. You can continue running Visio. Click OK to continue.

After you get these error messages, you can no longer view or modify shape properties or use the Database menu commands.


These errors occur if you delete a partially connected relationship line (a line with one endpoint connected and the other not connected to a table/entity shape). After you receive the errors, there is no way to recover the file.


To prevent these problems, download and install ENT5DB2.exe. The following file is available for download from the Microsoft Download Center:

[GRAPHIC: Download]Download ENT5DB2.exe now, the Database Model solution update

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. For a complete list of changes included in the database modeling update, click the article number below to view the article in the Microsoft Knowledge Base:

254523 Visio: Summary of Changes Provided by the UML and Database Model Solutions Updates


If you cannot download and install the update, you can still avoid the problem. When you need to delete a relationship line that is connected on only one end, disconnect the line before you delete it. You disconnect a line by dragging it away from the shape.

NOTE:If a relationship line is connected on both ends, you do not need to disconnect it before deleting it.

Microsoft also recommends that you create a backup of the database model file in a secure location and save the file frequently.

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