Excel is hanging on Opening ATPVBAEN.XLAM and does not respond anymore

Paul Gelderloos 0 Reputation points
2026-03-16T10:19:16.6333333+00:00

Trying to open files which have been working for years, Excel is hanging on Opening ATPVBAEN.XLAM and does not respond anymore. How to solve?

Microsoft 365 and Office | Excel | For home | Windows
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  1. AI answer

    2026-03-16T10:19:37.95+00:00

    ATPVBAEN.XLAM is the Analysis ToolPak add-in. If Excel hangs while loading it, treat it as an add‑in/startup issue and isolate it.

    Try these steps in order:

    1. Start Excel in Safe Mode
      • Hold Ctrl and start Excel, or run excel /safe from Run.
      • If Excel opens and does not hang on ATPVBAEN.XLAM, the issue is likely an add‑in or startup file.
    2. Disable the Analysis ToolPak and other add-ins
      • In Excel (normal or safe mode if possible):
        • Go to File > Options > Add-ins.
        • At the bottom, set Manage to Excel Add-ins and click Go.
        • Clear Analysis ToolPak (and any other nonessential add-ins), then click OK.
        • Also set Manage to COM Add-ins and click Go, then clear nonessential COM add-ins.
      • Close and reopen Excel normally and test opening the workbook.
    3. Manually troubleshoot add-ins via the registry (advanced) If Excel still hangs, follow the safe mode troubleshooting pattern:
      • Open Registry Editor.
      • Go to: HKEY_CURRENT_USER\Software\Microsoft\Office\<1x.0>\Excel\Options (for Excel 2016 or newer, <1x.0> is 16.0).
      • In the Name column, look for any REG_SZ values whose name is OPEN (or OPEN1, OPEN2, etc.). These can auto-load add-ins like ATPVBAEN.XLAM.
      • Right-click OPEN and select Rename.
      • Rename it to RenamedOPEN and press Enter.
      • Repeat for any other values starting with OPEN (for example, rename OPEN1 to RenamedOPEN1).
      • Start Excel in normal mode and test. If it now works, re-enable entries one by one by removing Renamed from the name, restarting Excel each time, until the problematic one (likely the ATPVBAEN.XLAM loader) is identified.
    4. Check Excel startup folders
      • Excel automatically opens workbooks/add-ins from XLStart and any alternate startup folder.
      • Move any files (including ATPVBAEN.XLAM copies) out of these folders temporarily.
      • Start Excel and open the workbook again.
    5. Repair Microsoft 365
      • If Excel still hangs, run a repair of Microsoft 365, which can fix damaged add-in components:
      • Follow the steps in Repair a Microsoft 365 application to perform an Online Repair.
      • After repair, start Excel and test opening the file.
    6. Check antivirus interaction
      • If antivirus integrates with Excel, it can interfere with add-ins.
      • Temporarily disable Excel integration or antivirus add-ins in Excel, following the vendor’s guidance. Be aware this can increase security risk; revert settings after testing.
    7. Environmental checks
      • Save the workbook locally (not on a network/SharePoint) and test.
      • Ensure Windows and Office updates are installed using Update Microsoft 365 and your computer.
      • If the workbook was generated by a third-party tool, test the same features in a new, blank workbook to rule out file corruption.

    If Excel continues to hang on ATPVBAEN.XLAM after these steps, contact Microsoft Support for guided troubleshooting.

    References:

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