https://help.tallysolutions.com/docs/faqs/all_releases/3636.html

Configuring the Option Ignore errors & continue during data import while importing data into Tally.ERP 9

The option Ignore errors & continue during data import is set to Yes in the F12: Configure screen (Company Info Menu/ Gateway of Tally > F12 Configure > General)

To avoid programming conflicts that may occur while the data is being imported. Setting this option to 'No' will ignore the error message and continue with the import of data.

Note : However, errors while importing data will be logged into the Tally.Imp file that is generated in the Tally.ERP 9 folder.