QB Issue Resolution:

There should be no problems stepping up to 17 from 12

Install 2017 and during installation select custom install, a couple of screens later insure the save path ends in 2017 so that your current install is not overwritten

then run a rebuild on 2012 several times and then run verify,when that is successful make a back up

open the company file in 2017 or restore from back up in 2017

Resolution for Issue 'QB ACCOUNTANT 2012 UPGRADE' available: Yes (Solved).
Source: Intuit Community forum.

QB ACCOUNTANT 2012 UPGRADE: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for 2012 UPGRADE
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Error Recovery for 2012 UPGRADE [Canada]
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