Importing customers from Magento 1.9.1.0 to 1.9.2.3

Question

I have a production instance of Magento which is running on version 1.9.1.0, and I have another instance of Magento which is running on version 1.9.2.3.

I am trying to export customers from the production instance into the new instance from Magento admin panel System=>Import/Export Area.

When trying to import the CSV file into the new instance I face many errors mainly due to the emptiness of some columns such as postcode for some customer. so I have filled all of them with "0" values. And right now when I try to import I get the following error : "E-mail and website combination is not found in rows: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10......"

My Questions are:

What might be the problem due to? and how can I resolve this?

Can I achieve the same thing by importing the customer tables via PHPMyAdmin instead of Magento admin panel? If yes, Do I need to import all tables that start with **customer_?**

Answer 1

I managed to import all the customers by following @AdarshKhatri comment.

Instead of going to Magento Admin System=>Import/Export=>Import I had to go to System=>Import/Export=>Data flow.

The rest of the steps are pretty much straight forward. First I exported the csv file from the export action in Data flow and then I imported that csv file using Data flow area again.