A TCP can be decompiled from Web Control only. Below are the steps for De-compilation Log on to www.tallysolutions.com Log in using Tally.Developer 9, Tally.Net Account ID and password. Click on License and Configuration, you will get an option TCP De-compilation. Click on Browse button to select the TCP file. Click on De-Compile. Following message is displayed 'Decompilation Done Successfully' Click on the link Download File to save the decompiled source code. The decompiled source code is available as zip file. You can also assign TCP Decompilation rights to any other users as well. Please refer to section Manage Account.