Error Code 402

This error occurs when Tally.ERP 9 is unable to connect to the configured Tally Gateway Server and Port.

Possible Reason for Failure

● If the Windows Firewall is blocking Tally.ERP 9, Tally Gateway Server, or both, this error may occur.

Possible Solutions

● Allow Tally.ERP 9 and Tally Gateway Server through Windows Firewall. Click here , to know how to allow any application through Windows Firewall.

After you have resolved the network issue you can:

● Retry, or

● Reconfigure your existing license.