QuickBooks - An error occurred. Your QuickBooks installation may have been modified. Reinstall QuickBooks and try again. If the problem persists, contact Intuit Technical Support and provide them with the following error codes: (-6010,-100).

When you launch quickbooks, select your company profile, put in the username and password you get the following error message: 

An error occurred. Your QuickBooks installation may have been modified. Reinstall QuickBooks and try again. If the problem persists, contact Intuit Technical Support and provide them with the following error codes: (-6010,-100).

You can try to reinstall, call QB support all options will get you no where trust me! 

I tried to fix the service switches / arguments and no luck with getting the service to start with the parameters I wanted. Quick fix for now is to execute the following from your QuickBooks directory:

"QBDBMgrN.exe -n QuickBooksDB24"

ie. "C:\PROGRA~2\Intuit\QUICKB~3\QBDBMgrN.exe -n QuickBooksDB24"

The SQL Anywhere interface will start and minimize, make sure not to log off from the server. Best is to run this on the console or as a scheduled tasks with an IF statement so one executable is running.

Now you can log into quickbooks.

P.S. To Intuit, for those users complaining about slow quickbooks wonder no more. The Sysbase database engine is licensed to use 2 physical processor, what about the cores ? Thanks Intuit!

P.S.S. If you want to see other options to for the service execute the tile as "QBDBMgrN.exe -?" the service option had -hv as a parameter, no explanation in the help page.