Unable to open the company
This error occurs if you try to open a company created or saved in a higher release of Tally.ERP 9, in a lower release.
1. Take a back up of your data in the release in which you were able to open the data.
2. After taking the back up of your data, rewrite the data in the lower release of Tally.ERP 9 in which you want to open the data.
To Rewrite
1. In the lower release of Tally.ERP 9, in the Company Info screen press Ctrl + Alt + R and select the company to rewrite. Select Yes as shown below.
2. You will be prompted to back up your data before rewriting. Select No since you have already taken a backup in the latest release.
Now you can open the data in the lower release of Tally.ERP 9.