"Persistent store migration failed, missing mapping model."

I recently upgraded to Version 3.4.2 and re-entered all my information, set up scenarios and all, though it took quite a bit of time. For those getting ready to upgrade or unaware of your Macs automatically upgrading to Yosemite 10.10.1, be aware that there a likely chance that you will be unable to open your files after upgrading. I was disappointed to see that the same error message has now been showing up when I go to open my file(s). "Persistent store migration failed, missing mapping model.” Has anyone had this issue recently since the last iOS update to 10.10.1? Is there any solution to this besides having to re-enter everything again!!? Other than that, the product is golden!

MannyReviews about Debtinator