QB Issue Resolution:
Update the older companies to QuickBooks Mac 2014. You can do that using the free trial available here:
Resolution for Issue 'Importing company data from older version of QB to QB online' available: Yes (Solved).
Source: Intuit Community forum.
Importing company data from older version of QB to QB online: 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 Company File
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!
Error Recovery for Company File [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.
Additional Support Options: