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Troubleshooting VSTO Add-ins missing in Office

This article describes troubleshooting missing add-ins in Office. The troubleshooting steps described reference Templafy VSTO add-ins, however the same steps can be used for the Templafy SlideProof add-in which is specific to PowerPoint.

  Prerequisites

  • Templafy Desktop installed on the PC.

Check if Templafy add-ins are enabled in an Office application

  1. Open Com Add-ins.
    • Path: Outlook/Word/PowerPoint/Excel > File > Options > Add-ins > select COM Add-ins from the Manage list > Go.
      • Look for the Templafy Add-in.

        mceclip0.png

  2. If the add-in is enabled as below, toggle the checkbox to see if there is an error message in the bottom of the dialogue box where it says, 'Load Behavior'. If the add-in is working correctly, it will display 'Load at Startup'.

    Screenshot_2019-01-25_at_10.11.35.png

  Note

The most common message, indicating a problem, is 'Not loaded. A runtime error occurred during the loading of the COM add-in'. Follow the steps below to troubleshoot.

Remove the add-in from Disabled items

  1. If the Templafy Add-in is not in the list of COM add-ins, go to Disabled Items as shown below to see if Templafy is listed there. If so, select it and hit Enable to see if the add-in now appears in the application.
    • Path: Outlook/Word/PowerPoint/Excel > File > Options > Add-ins > Disabled Items > Go.

Check if load behavior is set to 'Load at startup'

  1. While Office applications are closed, open Registry Editor.
  2. Navigate to Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\XXX\Addins\Templafy.OfficeVstoAddIns.XXX (Replace XXX with the desired Office application).
  3. LoadBehavior must be set to 3 (Load at startup) if it isn't already.
  4. After the above steps, open the affected Office Application to see if the Templafy Add-in now loads correctly.

Advanced troubleshooting

If the above steps did not resolve the issue, please try the following steps:

  1. While Office applications are closed, open Registry Editor.
  2. Navigate to Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0 and open the desired Office application folder.
  3. Access the folder Resiliency\DisabledItems and delete all keys present.

In addition, you can follow the steps below to enable VSTO Display Alerts:

  1. Open View advanced system settings from the Windows Start menu.
  2. Click Environmental variables.
  3. Click New.
  4. Type VSTO_SUPPRESSDISPLAYALERTS in Variable name and 0 in Variable Value.
  5. Open the desired Office application, navigate to COM add-ins, and try to toggle active the Templafy add-in - additional information should now be displayed.

Additional Slideproof troubleshooting

  • If the above steps do not work and Slideproof tools are still missing from the PowerPoint ribbon, there may be a problem with the office.dll file.
    • The location of this file is:
      C:\Windows\assembly\GAC_MSIL\office\15.0.0.0__71e9bce111e9429c
  • An office.dll file from a known working machine could be used to replace the problematic one in the above location. After doing so, please check if Slideproof now works.
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