Error - Cannot Create ActiveX Component

Symptoms

When launching Visio from within Process Navigator, an error is reported.

Cannot create ActiveX component

There may be more detail.

Call to CreateObject fail
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Cannot create ActiveX component.
Call to CreateObject fail
System.Exception: Cannot create ActiveX component.
at Microsoft.VisualBasic.Interaction.CreateObject(String ProgId, String ServerName)
at Triaster.ProcessNavigator.Common.ProcessObjects.visreg.vaoCreateGIO()
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Cause

This error has been found to occur when Visio information is missing from the Registry. Visio would write it, but then delete it. If that information were written outside of Visio, it persisted.

HKEY_CLASSES_ROOT\

.vsd\

.vsdm\

.vsdx\

Under each of those keys, '(Default)' and 'Content Type' information was missing.

This is what we'd expect to see on a working system:

.vsdm

.vsdx

Solution

Ensure that information persists in the Registry. It should be checked while Visio is closed.

It could be applied from a REG file using the following code: