Home → Troubleshooting → All Products: Other Issues → "Run-time error '-2147417856 (80010100)' "
Applies to: @RISK 6.x/7.x
I get the message
Run-time error '–2147417856 (80010100)'
Automation error
System call failed.
Different conditions can give rise to this error. Following are strategies that have worked for different customers in resolving this error.
Close everything and restart Windows – not just log off and on, but a full system restart.
Does this happen with more than one model? Check your active add-ins and try disabling them, then adding them back one by one. See Find and Fix Startup Conflicts (Excel 2007–2016).
If your simulation is not very large, switch to Multiple CPU: Disabled on the General tab of Simulation Settings.
A couple of customers, who had multiple versions of Excel installed, reported that they got this error in Excel 2013 but not 2010 or 2007, with the same model.
You may have COM registrations pointing to versions of Microsoft Office Excel or Project that aren't actually installed on your computer. Follow the instructions in Removing Outdated References to Office from the System Registry to remove them.
If you're using @RISK for Project release 4.1.4 (not @RISK release 6..x/7.x) and you have any background processes of Excel running, RISK may be unable to connect to Excel and you may get this error. Use Task Manager to check for any Excel.exe processes that don't have visible windows. If you find any, close Microsoft Project, then kill the Excel processes in Task Manager, then reopen @RISK for Project.
Last edited: 2015-12-21