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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). The following steps will normally resolve this problem. PERFORM EVERY STEP EXACTLY AS DESCRIBED HERE AND DO NOT SUBMIT A SUPPORT REQUEST WITHOUT THE INFORMATION REQUESTED IN STEP 11.
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 3.
C:\Program Files (x86)\Macabacus\Macabacus 20XX, or its equivalent on your PC. Confirm that the folder contains 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 above for "The Macabacus tab disappeared or is not visible."
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.
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.
If uninstalling Macabacus from within Windows' Control Panel and then reinstalling does not resolve this issue, see this link.
In general, most problems involving the Macabacus.xlam add-in can be resolved by pointing Excel to the correct location of this file. Normally, you can do this using Excel's Add-Ins dialog. If this approach fails, you may need to manually set the correct path to Macabacus.xlam in the registry.
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 load Macabacus.xlam from Excel's Add-Ins dialog, then Excel may be installed incorrectly. Ensure that Excel is installed with Microsoft Office Tools. Try loading other add-ins to confirm this problem, if necessary.
When Macabacus.xlam is loaded upon starting Excel, Excel's splash screen may appear to freeze while loading this add-in. What is mostly likely happening is that anti-virus software (e.g., Symantec Endpoint Protection) is either blocking the add-in from loading, or causes it to load slowly while it attempts to check the add-in. If this happens, either disable the anti-virus software causing the problem, or configure it to not scan Office add-ins.
Windows XP is no longer supported by Microsoft or Macabacus. Update your software immediately if you are still running Windows XP.
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.
This documentation refers to Macabacus version 8.8.4, and may differ from the PDF documentation
on your computer that installed with your version of Macabacus.