A PHP Error was encountered

Severity: Notice

Message: Undefined index: data

Filename: controllers/Converter.php

Line Number: 102

Backtrace:

File: /var/www/html/application/controllers/Converter.php
Line: 102
Function: _error_handler

File: /var/www/html/index.php
Line: 315
Function: require_once

Exception: convertion Input Data missing in /var/www/html/application/controllers/Converter.php:126 Stack trace: #0 /var/www/html/system/core/CodeIgniter.php(532): Converter->index() #1 /var/www/html/index.php(315): require_once('/var/www/html/s...') #2 {main}