David, I am able to run 2.6.19 and 3.4 on the same data file without problem. For most users, there are no such file changes--although I believe there is a date format change in one of the SQL storage back ends that might cause this. Gnucash developers have very carefully ensured that such changes only occur exceptionally, and are prominently highlighted.
As for your other points, Georgina didn't say she was having trouble opening Gnucash, she said her data was gone. That doesn't sound anything like those problems. Georgina, You said: "I have an Appl Mac laptop. I recently upgraded my working system to Mojavie, but then discovered my Gnu accounts package did not work. However, I was able to download a version of Gnu cash on an older computer, transferred the files to this older computer, and can now open the Gnu cash file. However, all the data appears to be lost. Do you have any idea how to recover the data?" When you upgraded, what problem did you encounter? What version of Gnucash did not work? What operating system was on your older computer? What version of Gnucash worked on that? Which files did you copy? How did you open the empty file on the older computer? Are you sure you opened the correct data file? And, have you ever made any backups of your system (e.g., using Time Machine)? There are many questions here, and I know you're worried right now, but it will take more digging to get to the bottom of your situation. The more detail you provide, the better you'll receive. David T. On January 15, 2019, at 8:00 AM, David Cousens <[email protected]> wrote: Georgina, If the earlier version was 2.6.x ( use Help->About to check the version running) and the version on Mojave is V3.x, there is a file conversion which should be run the first time you open the data file. Most of it is related to changes in the locations of configuration files but there may have been some file conversion. That you can open the file on an earlier version indicates this has not happened as you should not be able to open the file with a 2.6.x version once it has been converted to run with v3. https://wiki.gnucash.org/wiki/Configuration_Locations gives the locations for the configuration files for all 3 Operating systems. the locations labelled as MacOS. If you have no files in the config locations listed for v3 and there are files in the locations listed for V2.6 then it is likely the conversion won't have happened. I don't use MacOS but know some users have experienced difficulty with initially running v3. If you look back through the user mailing list archives "http://gnucash.1415818.n4.nabble.com/template/NamlServlet.jtp?macro=search_page&node=1415818&query=MacOS+++Gnucash+won%27t+open&days=180"; you should throw up some posts which should have some useful details and solutions. Failing that one of the MacOS users may reply. Good luck David Cousens ----- David Cousens -- Sent from: http://gnucash.1415818.n4.nabble.com/GnuCash-User-f1415819.html _______________________________________________ gnucash-user mailing list [email protected] To update your subscription preferences or to unsubscribe: https://lists.gnucash.org/mailman/listinfo/gnucash-user If you are using Nabble or Gmane, please see https://wiki.gnucash.org/wiki/Mailing_Lists for more information. ----- Please remember to CC this list on all your replies. You can do this by using Reply-To-List or Reply-All. _______________________________________________ gnucash-user mailing list [email protected] To update your subscription preferences or to unsubscribe: https://lists.gnucash.org/mailman/listinfo/gnucash-user If you are using Nabble or Gmane, please see https://wiki.gnucash.org/wiki/Mailing_Lists for more information. ----- Please remember to CC this list on all your replies. You can do this by using Reply-To-List or Reply-All.
