Macabacus and Microsoft (for the most part) no longer support Internet Explorer 10 and prior versions. Please consider upgrading your browser.
Understanding whether Macabacus simply failed to load in Office applications, or failed to install in Windows at all, is important. The latter scenario is very uncommon, but can be confirmed by inspecting your list of installed programs under the Windows Control Panel. If Macabacus appears in that list, then installation was likely successful and Macabacus simply failed to load properly. Follow the troubleshooting steps applicable to your situation below.
If an administrator performs an "over-the-shoulder" installation for you, you may need to log out of Windows and log back in for the installation to finish.
For help with Macabacus Lite loading or installation, please see these installation instructions.
There are two Macabacus add-ins for Excel. The VBA add-in named Macabacus.xlam is a helper add-in, and is generally of no concern in troubleshooting unless an error message specifically references this file. The Macabacus VSTO add-in, which appears in Excel's COM Add-Ins dialog, implements most Macabacus functionality, including display of the Macabacus tab in the ribbon.
Do not attempt to open the Macabacus .vsto files located under the Program Files folder in an effort to force the Macabacus tab to appear in Office applications. This will not solve your problem, and may create other issues.
If Macabacus appears to be properly installed, but the Macabacus tab is not visible in the ribbon of one or more of your Office applications, then it is probable that Macabacus failed to load in your Office application(s). Perform the following steps to troubleshoot this issue:
File > Options > Add-Ins, select COM Add-Ins from the dropdown menu, and click the Go button. If Macabacus is unchecked in the COM Add-Ins dialog, check it and click the OK button.
HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\Macabacus20XXor the key corresponding to the Office application in which the Macabacus tab is missing, if not Excel. If the LoadBehavior value is 0 (zero) here, change it to 2 or 3.
C:\Program Files (x86)\Macabacus\Macabacus 20XX, or its equivalent on your PC. Confirm that the folder exists, and is populated with at least ten or so files.
If Macabacus failed to install properly in Windows, perform the following troubleshooting steps:
File > Options > Add-Ins. In this dialog, select COM Add-Ins from the dropdown menu and click Go. If Macabacus appears in the list of COM add-ins shown here (but is presumably unchecked), then your problem is more likely that Macabacus failed to load. In this case, perform the troubleshooting steps below for "Macabacus will not load in my Office application(s)."
MsiFFFFF.log(or something similar) located in the Temp folder to firstname.lastname@example.org. Check the Date Added property of the log file to be sure you have the correct log file.
Perform the following steps to resolve this issue:
Macabacus.xlamfile exists at the path shown in the error message. If it does not, reinstall Macabacus.
Alt>T>I), uncheck Macabacus if already checked, and click OK to close the dialog. Then, open the dialog again and click the Browse button to find
Macabacus.xlamat the path shown in the error message. Be sure Macabacus is now checked, and click OK to close the dialog. Office can be finicky about changing the paths of add-ins, so you may need to try this, and restart Excel a few times for it to stick.
Macabacus.xlamusing the Registry Editor. The registry key should be
HKEY_USERS\Software\Microsoft\Office\15.0\Excel\Options, or something similar, depending on your version of Office.
This may occur if you have recently upgraded (or downgraded) Microsoft Office. Macabacus for Office 20XX looks for the XLAM add-in referenced above in
C:\ProgramData\Macabacus\Macabacus 20XX. For example, if you upgraded from Office 2013 to Office 2016, but still have Macabacus for Office 2013 installed, Macabacus looks in
C:\ProgramData\Macabacus\Macabacus 2016 for the XLAM but cannot find it, producing this error. In addition, Excel stores the path to the XLAM in the registry. When you upgrade from Office 2013 to 2016, Excel might still look in
C:\ProgramData\Macabacus\Macabacus 2013 for the XLAM add-in. Sometimes, the only way to tell Excel the correct place to look is by editing the registry manually.
Alt>T>I) and select the Macabacus add-in. You may receive a prompt asking you to delete it. If so, click OK and then exit the dialog by clicking OK.
Perform the following steps to resolve this issue:
Alt>T>I), uncheck the Macabacus add-in, and click OK.
Macabacus.xlamfile in the location shown in your error message. You may receive a Yes/No/Cancel prompt from Excel asking you to replace the
Macabacus.xlamfile. If so, click Yes.
Macabacus > Settings > Keyboardand click the Override button. Your Macabacus shortcuts should now be working correctly.
If this error occurs upon starting Excel, or when trying to manually add load Macabacus.xlam from Excel's Add-Ins dialog, then Excel may be installed incorrectly. Ensure that Excel is installed with Microsoft Office Tools.
Be sure that you have installed the full version of Office 20XX, and not the Office on Demand version. Office on Demand does not support VSTO add-ins like Macabacus, and should not be used in professional computing environments.
Macabacus requires .NET Framework 4.5 or newer. Your computer likely has an earlier version installed. It is generally safe to proceed with this Microsoft update.
If uninstalling Macabacus from within Windows' Control Panel and then reinstalling does not resolve this issue, see this link.
Confirm that you have Windows XP Service Pack 3 installed. Macabacus signs its installer with a SHA-2 certificate, and Windows XP did not support SHA-2 until Service Pack 3. Prior to Service Pack 3, Windows XP only supported SHA-1, which has been deprecated in favor of more secure SHA-2. Note that Windows XP is no longer supported by Microsoft and, therefore, is not supported by Macabacus.
You may need to install either (a) the hotfix described at http://support.microsoft.com/kb/976477 and related prerequisites or (b) Microsoft .NET Framework 2.0. You will most likely encounter this problem when running Office 2007 in Windows XP.
Your Macabacus Lite installation is valid for a single computer. If you switch computers, download another copy of Macabacus Lite for the new computer.
Make sure that you have Microsoft XML, v6.0 installed. A typical Office installation will include Microsoft XML, v6.0, however, some versions (e.g., student editions) may not. To install Microsoft XML, use your Office installation CD, DVD, or file.
Macabacus must periodically "call home" to the Macabacus.com server to initiate trials, perform user authentication, log errors and activity (if enabled), check for newer versions of the software, and other operations. If Macabacus cannot connect to the Internet, you may be unable to use Macabacus.
Networks using proxy servers to access the Internet may block requests to Macabacus servers. Your proxy must support inbound/outbound connections to Macabacus.com on standard ports 80 and 443. You may need to allow anonymous pass-through at the proxy level by white-listing the following (both HTTP and HTTPS):
To whitelist these domains in Windows 10, go to
Start > Settings > Network & Internet > Proxy and enter exceptions for the domains above as shown below:
To whitelist these domains in Internet Explorer, go to
Tools menu > Internet options > Connections tab > LAN settings. Make sure "Use a proxy server for your LAN is checked", and click the Advanced button. Enter exceptions for the domains above as shown below:
For help troubleshooting keyboard shortcut problems in Excel, refer to this page.
Macabacus > File > Optimizemenu and open Name Scrubber. Remove any unused names by clicking the Clean Names button and performing a Deep Clean, or remove names manually from the list. If you are satisfied that hidden names are not in use, delete them, too. Note that some add-ins, including Macabacus, use hidden names for legitimate purposes (e.g., linking), so be careful when deleting them.
Macabacus remembers the last position of the Pro Precedents/Dependents dialogs. Sometimes, these dialogs can appear outside of your screen's viewable area. This can happen if you are working in Excel on a large docking station screen, undock your laptop and begin working on the laptop's smaller screen. Use the
Ctrl+End shortcuts immediately after executing Pro Precedents/Dependents to bring the hidden dialog back into view.
File > Options > General and uncheck the "Open e-mail attachments and other uneditable files in reading view" box.
For problems not addressed by the troubleshooting guides above, please contact us for assistance.
File > Options > Advanced > General. If this box was not originally checked, reproduce the problem and note any new error messages that appear.
In Excel, PowerPoint, or Word, click the
Macabacus > Help > Email Support button to compose a new support request email in Outlook that includes attachments we may need to investigate your problem. If you do not use Outlook, email email@example.com from your email client/service. So that we can resolve your issue as quickly as possible, be sure your email includes:
This documentation refers to Macabacus version 8.8.11, and may differ from the PDF documentation
on your computer that installed with your version of Macabacus.