how to resolve USER_ERROR Please configure line 1 of the operations machine.

AI generated answer (using internal Slack threads):

The error message "USER_ERROR Please configure line 1 of the operations machine" typically occurs when you're trying to access or manipulate line items in a beforeLoad User Event Script, specifically on record creation. In NetSuite, when a record is being created, line items are not accessible in the beforeLoad event because they haven't been added yet. This is why you're seeing the error message. To resolve this issue, you should move your line item manipulation code to a different event, such as afterSubmit or beforeSubmit, where line items are accessible. If you're trying to manipulate line items in a beforeLoad event on record view or edit, ensure that the line items exist and are accessible. Remember, in beforeLoad User Event, you can't select or commit lines. You should use standard mode related methods instead. Here's a sample code snippet for handling line items in an afterSubmit event:

javascript
function afterSubmit(scriptContext) {
    var record = scriptContext.newRecord;
    var lineCount = record.getLineCount({sublistId: 'item'});
    for (var i = 0; i < lineCount; i++) {
        var lineItem = record.getSublistValue({sublistId: 'item', fieldId: 'item', line: i});
        // Perform your operations on the lineItem here
    }
}

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