May 13, 2020 · Electra E8 · Visio

Compile Error in Hidden Module

Sometime after you have updated Microsoft Visio, you might see an error message "Compile Error in Hidden Module" when you open Electra.

To fix the error, please follow the instructions listed below:

  1. Close Visio and Electra.

  2. Look for the following folder:

    Window XP:
    C:\Documents and Settings\%USERNAME%\Application Data\Microsoft\Forms\
    Window Vista/7:
    C:\Documents and Settings\%USERNAME%\Application Data\Microsoft\Forms\

    To browse and open the folder, copy and paste the path above onto your Window Explorer. The "%USERNAME%" will be automatically renamed by Windows to your current username.

  3. Delete all files ending with .exd

    Backup these files if necessary by renaming them from "MSComDlg.exd" to "MSComDlg_bak.exd". Once these files are deleted, Windows will automatically recreate them when they are needed.

  4. Run Visio and Electra, and the error should be fixed.

Thanks for your patience.

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Thomas Yip

Founder at, created Electra, engineering nerd.

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