Hello i went to go play alpha 12 and im having the error in the title. i have validated my files and it still doesn't work. is their a fix?
Thanks for posting a log, they're always helpful.
Your log file shows you starting A19 and that the last version played was A18.
You can' mix versions; you have to delete or remove all data and worlds from one version before using another.
If you have worlds from different versions that you want to keep, you need to back them up first.
For newer Alphas they are in your appdata/roaming/7daystodie folder
For older versions like A12/A13 the save folder was your windows documents folder.
You can use the clean tool as
@Rolandhas suggested to clean your data.
From Steam Library click "Play"
Select "Show Game Launcher" from the popup.
Click "Play"
From the game launcher select the "Tools" tab.
From the Tools tab select "Clean game data..."
Check all the boxes and select "All Maps" under Discovered map of remote games.
Click "Clean"
I don't know if the clean tool was around in the old alphas, but if not, you can manually delete the save data from the folders I've indicated.
Good luck.