Hi, I'm about to import our 6000 records from an old DOS based library system to Koha 3.0. I understand the best way to do this is using the misc/migration_tools/bulkmarcimport.pl tool after creating the marc file from csv with MarcEdit. Currently all the fields I could export from our old system were the following: Catalogue Record Number (barcode field?) Title 245a Series 440a Author 100a Subject 650a Call number (local) 082ab ISBN 20a Publishing - Name 260b Publishing - Place 260a Publishing - Date 260c Extra 653a? GMD (Item type) 942c What is the best field to use for the barcode? Also the Extra field has some additinal info about the subject of the book. I was thinking this would perhaps fit in 653a. I noticed that by default there are a number of MARC fields mandatory. For example, what is the 000 leader field used for and why is it mandatory? Should I be using those fields or is it save to not make them mandatory? BTW, are there any instructions available on using the bulkmarkimport tool? Thanks, -Jochum