Follow below steps to resolve this issue.
Take Backup of your Tally Data then Simply Delete all .TSF files in that particular Company Data in the Tally Directory.
Rightclick the Tally shortcut in the Desktop, go to properties, Copy the Tally .exe path which is in the Target Box. (for e.g C:\tally.erp9\tally.exe)
Then –> goto Start–> Run–> Paste press space and type the Tally full data path and press space 0 (C:\tally.erp9\tally.exe C:\tally.erp9\Data 0).Press enter.
When tally opens, press ctrl+alt+R. Choose the company that you are getting the error msg. It will ask for rewrite company select Yes and process. Once you complete the Rewrite process, then open the company in Tally.
If you are still facing the same issue please send your data backup on firstname.lastname@example.org or call on 022 41946440 for further assistance.