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Error: -6129, 0: Database connection verification failure, when opening or creating a company file

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QuickBooks Performance Issues & Program Errors

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  1. Alex David on Jan 21, 2013 reply

    This error can be caused by: A damaged network data file (.nd file extension). If you are getting this error and attempting to update your company file. If this fails then disable antivirus and other software using Windows Safe Mode or rename QuickBooks “.nd” files.

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