How to run an import to change transaction line field

AI generated answer (using internal Slack threads):

To run an import to change a transaction line field, you can use a CSV import in NetSuite. Here are the steps: 1. Create a CSV file with the necessary data. The key fields you need to map are the internal ID of the main line and the line ID on the line level. These fields will allow NetSuite to identify which lines you're editing versus adding. 2. In NetSuite, navigate to Setup > Import/Export > Import CSV Records. 3. Select the record type you want to import. In this case, it would be the transaction type that corresponds to your custom transaction line field. 4. On the CSV Import page, select 'Update' as the import type. This is because you're updating existing records, not adding new ones. 5. Upload your CSV file and map the fields. Make sure the internal ID and line ID fields in your CSV file match the corresponding fields in NetSuite. 6. Under the 'Advanced Options' section, ensure that the 'Overwrite Sublists' option is enabled. This allows the import to update sublist fields, such as line items on a transaction. 7. Review your settings and start the import. Please note that this process will still be an "update" operation if the sales order already exists, rather than an "add or update". If you're updating a large number of lines (like 100,000+), using a CSV import is going to be much easier than doing it manually or by script. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******