When trying to open a Simply Accounting 2007 or older version of the database in Sage 50 2016, the following messages appear:
If the database you are converting from is in 2008 to 2013 version and you do not have the older version of the software on the same machine anymore, when you are trying to open this database directly in Sage 50 2016, the following messages appear:
Solution: install a trial version of Sage 50 2015 on the same machine, open the database directly in Sage 50 2016 version, the conversion will start
Resolution for Issue ‘How do I convert company files from Sage 50 2013 or earlier to Sage 50 2016.’ available: Yes (Solved).
Source: Sage Community forums.
Disclaimer: Accounting File Repair Support is an independant provider of database-related services and is not affiliated with Sage or Intuit.
How do I convert company files from Sage 50 2013 or earlier to Sage 50 2016.: this issue or error code is a known issue related to Sage accounting products. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Sage 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 you are experiencing too many issues, you may want to export from Sage 50 to Quickbooks. See also: downgrade from Sage 50 Quantum to Sage 50 Pro/Premium or export Sage. If it is a complex issue or you are unable to solve the issue, you may contact us by contacting Sage Repair or by using other support options.