1. Check the Trade files. An empty trade file might have been generated to identify the trade file and delete it.

2. Lets understand this with an example:[Suppose you have traded in derivatives and didn't do any trade in equity, your trade files for derivatives will be generated and in certain cases what happens is an empty trade file for equity gets generated with 1KB file size. In this case the error pops up while taking upload in talkdelta exe ] You need to identify the empty trade file and delete it.