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2.42. "Could not load ATHLIB32.DLL" (Commercial Software)

Applies to: All products, release 5.0 and newer

When I try to launch my software, I get the message

Could not load ATHLIB32.DLL.

If you have a recent textbook, please see "Could not load ATHLIB32.DLL" (Textbook Software). If you upgraded commercial software from 4.0 or 4.5 to a later version, keep reading the present article.

You previously had a 4.x release of our software installed, and you uninstalled it but the add-in is still enabled in Excel. Since the actual add-in file no longer exists on your computer, you get this error. The solution is to remove the add-in from the list, as follows:

  1. Open the Excel add-ins window:

    • Excel 2010: Click File » Options » Add-Ins, then at the bottom of the page select "Manage Excel Add-Ins" and click Go.
    • Excel 2007: Click the round Office button, then Excel Options, then Add-Ins, then at the bottom of the page select "Manage Excel Add-Ins" and click Go.
    • Excel 2003 or below: Click Tools » Add-Ins.

  2. Remove the check mark from DTools32.

  3. You may see a message similar to this one:

    Cannot find add-in '\DTOOLS\SYSTEM\dtools32.XLL'. Delete from list?

    or

    Cannot find add-in 'C:\Program Files\Palisade\SYSTEM\dtools32.XLL'. Delete from list?

    Click Yes to delete it from the list.

  4. Click OK, and close Excel.

Last edited: 2015-09-29

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