There are some situations when you would hit the limit of input variables that your server configuration allows. It may happen if you create a View using too many filters or try to display too many fields.
You can increase the number of imputs that your server allow by placing the following in your .htaccess:
php_value max_input_vars 3000
If you are using the Suhosin patch on your server, you will also need to add this:
php_value suhosin.post.max_vars 3000 php_value suhosin.request.max_vars 3000
It may happen that you hosting provider does not allow this modifications in your .htaccess. In this case, you will need to add this line to your php.ini file: