1.Once the return has been prepared as per the file format, it can be verified using the File Validation Utility (FVU) provided by NSDL.
2.The e-AIR FVU is a Java based utility. JRE (Java Run-time Environment) [versions: SUN JRE: 1.4.2_02 1.4.2_03 1.4.2_04 IBM JRE: 188.8.131.52 should be installed on the computer where the e-AIR FVU is being installed. Java is freely downloadable from http://java.sun.com and http://www.ibm.com/developerworks/java/jdk or you can ask your vendor providing computer facilities (hardware) to install the same for you.
4.To install the FVU, after extraction of the setup file, read the instructions contained in file AIR FVU Setup Readme.rtf
5.Once the setup is over, AIR FVU can be invoked by clicking on AIR FVU.bat
6.When AIR FVU.bat is clicked one screen appears, which asks for Input file name and Error File Path.