When trying to link a QuickBooks company file to NumberCruncher for the first time you may receive the following error.
Open QB: An internal QuickBooks error occurred while trying to access the QuickBooks data file.
Cause 1: Your QuickBooks datafile may have corrupt data.
Rebuild your QuickBooks company data file. From the QuickBooks File Menu ->Choose Utilities ->Rebuild Data.
Cause 2: You have multiple versions of QuickBooks on your machine:
1. Uninstall all versions of QuickBooks using Add/Remove Programs
2. Delete folder - C:\Program Files\Common Files\Intuit\QuickBooks
3. Reinstall only one version of QuickBooks
Cause 3: Windows rights
You are using any Windows operating system and the user does not have domain rights. Grant all the way up to administrator rights, domain user, guest, etc etc but leave administrator right out if possible, if not include it.
Update privileges.....then loging as either Administrator or user on the respective domain and see if problem goes away.