[Koha] Import the MARC21 with Item details

Hello everyone, I have marc21 file with more than 20K records, I would need to import in the Koha with the barcode, I have updated the Marc21 file with MarcExit tool and added items with 952, but still it doesn't reflect in the Koha catalog. When tried to use circulation it says invalid. So please let me know how can I import marc21 file with barcode data. For barcode I have tried these 2 things: =952 \\$a2442 ;$b2442 ;$o2442 ;$p2442 ;$yBooks =952 \\$p2442 Both are not working, please let me know how can I fix it. -- Thanks, Laxmilal Menaria | +91 982 955 3793 | http://laxmilalmenaria.com/